Why do I prioritize the polygon and the OpenSea? For the creation and listing of NFT this combination is completely free. A very important feature – I can send NFT to a friend and neither he nor I will pay anything for it. Cool. Multiple cryptocurrenciess are also supported at the OpenSea site. I will not list, see for yourself. A clear and convenient interface of the Open Sea, ease of use, and recognition in the World, i.e. a large number of users. This is probably not all, add.
Note that the pictures used for this site I register as NFT – opensea.io