https://techcrunch.com/2022/06/30/nft-opensea-data-breach/

Opensea, the popular NFT marketplace that hit a colossal $13 billion valuation in January, is warning users of email phishing after a data breach.

A staff at Customer.io, an email vendor contracted by OpenSea, misused their employee access to download and share email addresses of OpenSea’s users and newsletter subscribers with an unauthorized external party, the world’s largest NFT marketplace said Wednesday night.