NFT Marketplace Opensea Joins the Blockchain Unicorns, Project Now Supports Polygon by Haruna Magaji August 24, 2021 0 NFT Marketplace Opensea Joins the Blockchain Unicorns, Project Now Supports Polygon - One of the largest non-fungible token (NFT) marketplaces today, Opensea, has announced the company has raised $100 million in a ...