Binance announced that after the Megadrop IEO event, it banned around 300 accounts - 297 to be precise. The reason? Sybil attacks. Airdrop hunters use various sophisticated strategies to get as many free tokens as they can. However, more projects are implementing strategies to fight farmers. 

Over a million users participated in the Megadrop IEO event, demonstrating a high level of user participation. Yet despite enormous interest, 102,000 accounts were found to be fraudulent by Binance's risk control procedures. As more accounts are examined, this number is updated continuously.