All marketplace platforms such as opensea, they can accommodate all types of NFT and you just type the hashtag #meme in the search field for this category. Why do we need it to be separate? And you say "requires admin approval", that is closer to abuse of rights.
Anyway, projects related to memes in my opinion will have no prospects at all in the future. But maybe I'm wrong, I just see new useless meme projects launched every day.
Because he is specific on a niche where openseas just allows any type of nft's to be published, as he mentioned he is looking for the community or the admins to approve them so we have consense here and the scams of nft's can be avoided