The MegaETH presale has been targeted by a Sybil attack, with over 20 entities using multiple wallets to bypass the $186,000 maximum allocation limit, according to Bubblemaps. One notable instance involved the address 0x9f5c, which withdrew funds from Kraken and distributed them across three new addresses, collectively investing $600,000 using these four addresses. Despite Echo's implementation of KYC verification for all users, individuals are reportedly attempting to make multiple investments under different identities.