I only play on Stake and CryptoGamble - I know that both have affiliate programs but I don't really use any of them. Maybe because I mostly play for fun and I don't find a need to engage more people in this. But I believe there are many people for whom this idea should work really nicely
If you are gambling for fun, those
affiliate programs won't bring you much fun, i can guarantee you that. If you do it properly they can give you a nice profit though.