In germany, steam already blocked almost all "nsfw" content, wich is why itch was so great. only a few games had a smart solution by putting a barely palyable "sfw" version on steam and by downloading a free patch from the games site you'd get the full thing. If itch does end up without any nsfw, I only know of "Kagura games", they are fine putting up third-party games on their store page, maybe more creators will approach them for that.