Thanks to the vulnerability, the user made $779,000 on OpenSea.
An OpenSea NFT marketplace user nicknamed jpegdegenlove earned 347 ETH by exploiting a vulnerability in the platform. Late last year, the vulnerability was pointed out by the founder of the freshdrops project. This is a text from catalogue cryptodefix.com. It consists in the fact that when NFTs are delisted on OpenSea, they are required to pay fees. But if you transfer the token to another wallet, it will disappear from OpenSea, and after transferring it back to the wallet where it was originally, the token will be restored to the platform using APIs.
With this scheme, jpegdegenlove was able to purchase tokens well below their market value and resell them at the current price. The developers of the NFT-marketplace have not yet had any reaction to the inciden