The ZKsync airdrop, launched on June 17, 2024, was billed as one of the largest Layer-2 token distributions in crypto history, with 3.675 billion ZK tokens—17.5% of the total 21 billion supply—allocated to 695,232 wallets. As a leading Ethereum Layer-2 scaling solution leveraging zero-knowledge rollups, ZKsync had built a massive community of 7 million users, all eagerly anticipating a reward for their early adoption and engagement. However, what was meant to be a celebratory event turned into a firestorm of controversy, with widespread accusations of unfairness, poor Sybil filtering, and exclusion of loyal users. Branded with the hashtag #ZKscam on X, the ZKsync airdrop has been labeled one of the most disappointing in Web3 history. Here’s why.
Unclear and Unfair Eligibility Criteria
The ZKsync airdrop eligibility was based on a snapshot taken on March 24, 2024, marking the one-year anniversary of the ZKsync Era mainnet launch. To qualify, users needed to meet at least one of seven activity-based criteria, such as interacting with 10 non-token smart contracts, using the Paymaster feature, or holding specific NFTs like Libertas Omnibus. Allocations were determined by a value-scaling formula that prioritized the amount and duration of assets bridged to ZKsync Era, with multipliers for activities like early ZKsync Lite usage or Ethereum mainnet interactions. While this sounded robust on paper, the execution sparked outrage.
Many dedicated users who had actively engaged with ZKsync for years—bridging funds, trading on DeFi protocols like SyncSwap, minting NFTs, and participating in community campaigns—found themselves ineligible or receiving paltry allocations. For instance, one user on Reddit reported $2 million in trading volume, 700 transactions on ZKsync Era, 100 on ZKsync Lite, and $10,000 in bridged liquidity, yet received only 1,476 ZK tokens, worth roughly $400 at launch. Another user, with $23,993 in volume, 137 transactions, and 15 months of activity, was deemed ineligible entirely, while a friend with just three months of activity received tokens
The criteria heavily favored liquidity provision over time, which disadvantaged users who focused on diverse ecosystem interactions like NFT minting or DeFi trading. This led to accusations that the system rewarded “airdrop farmers”—users who strategically gamed the criteria with minimal genuine engagement—over loyal community members. Prominent projects like zkApe, an NFT marketplace generating $15 million in gas fees, and DMail, a decentralized messaging app with high user activity, were shockingly excluded, further fueling perceptions of arbitrary selection.
Sybil Attacks and Inadequate Filtering
A major point of contention was ZKsync’s failure to effectively filter Sybil attacks, where single entities create multiple wallets to maximize airdrop rewards. Critics, including Polygon’s Chief Information Security Officer Mudit Gupta, called it “the most farmable and farmed airdrop ever,” noting that “almost no Sybil filtering” was applied. X user Olimpio highlighted that 155 wallets exceeded the 100,000 ZK token cap, with some Sybil accounts reportedly bagging up to 2 million tokens by depositing identical ETH amounts on the same day. Many of these wallets were flagged on LayerZero’s Sybil list, yet still received substantial allocations.
ZKsync’s team defended their approach, arguing that aggressive Sybil filtering risked excluding legitimate users. They claimed their system prioritized addresses with a “high likelihood” of being genuine, assigning fewer points to underfunded wallets and more for human-like on-chain behavior. However, the community felt this was insufficient, especially when influencers and large holders, including Bybit’s hot wallet, reportedly received massive allocations like 52,000 or 100,000 ZK tokens, while single-wallet users got as little as 35 tokens ($5.15 at launch). This disparity led to accusations that the airdrop favored insiders and bots over real users.
Lack of Transparency and Communication
Transparency was another sore point. While ZKsync published a CSV file of eligible wallets on GitHub—a rare move for transparency—the eligibility criteria and allocation logic were poorly communicated. Users reported confusion over why they were excluded despite meeting multiple criteria, with some speculating the checker tool was flawed. One GitHub user, a developer active in the ZKsync ecosystem, expressed frustration that none of their known crypto contributors were eligible, suggesting systemic errors in the process.
The lack of clear explanations eroded trust. Community members felt betrayed, with one X user stating, “Team members got the highest allocation and shared most of the funds between them, while the rest was distributed randomly to chain interactors.” Another user, who spent $8,000 farming ZKsync, received just $700 worth of tokens, calling it a “heartbreaking” letdown. The trending #ZKscam hashtag encapsulated this sentiment, with users like Sarkesh declaring, “You are trending as the biggest scammer. We will work to destroy [the network].”
Impact on ZKsync’s Ecosystem
The backlash had tangible consequences. ZKsync’s Total Value Locked (TVL) plummeted from nearly $200 million to $128 million post-airdrop, reflecting a loss of user confidence and engagement. The ZK token price also suffered, dropping 25% from its all-time high of $0.2768 at launch to lower levels as users sold their allocations, with no vesting or lock-up periods exacerbating the selling pressure. Posts on X labeled ZKsync a “ghost chain,” with users like
@soligxbt noting that collaboration with LayerZero, which implemented stricter Sybil filtering for its own airdrop, could have mitigated the fallout.
The exclusion of key ecosystem projects like zkApe and DMail further alienated developers, with zkApe forming a coalition with other projects to petition Matter Labs for inclusion. The community’s frustration was compounded by the perception that ZKsync prioritized experimental allocations—such as to Farcaster users or Pudgy Penguins NFT holders—over those who drove the network’s growth.
A Missed Opportunity for Community Building
Airdrops are meant to reward early adopters, incentivize engagement, and foster governance participation. ZKsync’s airdrop, with 89% of tokens allocated to users and 11% to contributors like developers and researchers, aimed to achieve this. However, the execution undermined these goals. By capping allocations at 100,000 ZK and redistributing excess tokens to ensure a minimum of 917 ZK per wallet, ZKsync intended to balance fairness. Yet, the focus on liquidity and failure to reward diverse contributions left many feeling “slapped in the face.”
The community’s disappointment wasn’t just about token value but a sense of betrayal. As one Medium post by an early supporter noted, “This decision sends a message about what is valued. By not recognizing the efforts of early supporters, ZKsync risks alienating its most dedicated base.” Users who spent significant time and money—some burning $20,000 or more on gas fees—felt their contributions were undervalued, prompting calls to abandon the network for chains like Hyperliquid that maintained activity post-airdrop.
Lessons for Future Airdrops
The ZKsync airdrop offers critical lessons for the crypto industry. First, robust Sybil filtering is non-negotiable. Projects like LayerZero, which implemented stricter anti-Sybil measures, avoided similar backlash. Second, transparent and inclusive criteria are essential to maintain trust. ZKsync’s failure to clearly communicate how points were calculated or why major contributors were excluded fueled distrust. Finally, rewarding diverse engagement—beyond just liquidity provision—ensures airdrops align with the ethos of community-driven Web3 projects
Looking Ahead
Despite the controversy, ZKsync remains a technologically advanced Layer-2 solution with potential to scale Ethereum efficiently. The airdrop allocated 66.7% of the ZK supply to the community, with 49.1% reserved for future ecosystem initiatives via the ZKsync Foundation and ZK Nation governance. This suggests opportunities for redemption through future rewards or grants. However, rebuilding trust will require addressing community concerns, improving transparency, and prioritizing genuine users over farmers.
For now, the ZKsync airdrop stands as a cautionary tale of how high expectations and poor execution can erode community goodwill. As one X user put it, “ZKsync was one of the biggest disappointments last year, that’s why it’s now a dead chain.” Whether ZKsync can recover its momentum and restore faith among its 7 million users remains to be seen, but the path forward demands accountability and a renewed commitment to fairness.
Sources:
- Crypto.news: ZKsync airdrop under fire for Sybil attacks and ineligibility cases
- The Block: ZKsync to airdrop 3.6 billion ZK tokens
- CoinCodeCap: The Great ZKSync Scam
- Bitrue FAQ: ZKSync’s Airdrop Controversy
- CCN.com: ZKSync Controversy
- Medium: Disappointment with zkSync
- Reddit and X posts reflecting community sentiment
