Generally, game affiliate programs are long-run earnings. It takes time to convert the users and get them to pay (in the case of freemiums), and pay-to-play off the bat is not the usual case. That doesn't mean you can't earn with them - just be ready for a longer wait. There's a very cool real life hentai site that's recently launched, maybe try running ads for them, I think they have an affiliate program though I couldn't find the link, maybe reach out
https://hentaied.com/