We already know that those NFTs will be given to all the existing clients of EVO, and some will be kept for any future clients. As far as I understand, their purpose will be like boosting the cash backs or better terms for the players who have them, maybe some exclusive promos as well. I don't know either if it will be a marketplace for them, but it would be a good addition. I guess that we will have to wait for a month to know the whole story about them.
So does this mean every EVO users will be whitelisted, and there will be no public mint since it's all for EVO players? I haven't kept up with the latest updates on NFTs.
As for the marketplace, I guess the usual places could work like opensea and magiceden for instance. It would be nice if the NFT's would be on a popular chain as it would likely be supported in those places.