Nothing new is happening. Visa has not changed or updated their rules and neither did Steam. Steam already deletes 10000s of low effort porn games every day depending on random factors, taking screenshots of the SteamDB events list like there's anything new in there is retarded.

If Steam had a blanket ban on this stuff, there would not be an official porn tag on Steam and many established porn game IPs wouldn't be there, but they've always been there and will continue to be there.