OpenSea, the leading NFT marketplace by volume, will continue to enforce creator fees on its platform for existing collections. This means that, unlike many exchanges which have made royalties optional, the creators of NFT collections already trading on OpenSea will be able to continue to collect royalties on trades. 

The move comes after the exchange announced on Saturday that it would only collect royalties on new collections that include code that blacklists the sale of the NFTs on competing marketplaces that don’t enforce fees.