Check bustadice, bustabit, cryptogames, bitvest, mintdice. Avoid freebitcoin.

The trend is moving, I don't see any new casino offering bankroll investment anymore, instead they offer their own tokenized asset. It could be token or NFT.

Casinos who sell their tokens are bc.game, shuffle, blackjackfun, rollbit etc.
Casinos who sell their NFTs are metawin and rollbit.