Sorry to say, but the devs have exactly what they deserve. Their front page practically screamed "incest", "rape", "loli", etc. When you are doing adult games you don't need this type of description on your Patreon site, because 99.9 percent of your patrons know about your game from places like f95, porn sites, etc.
And when you're doing this type of game, when you start earning big money on this game, it is in your own interest to stay "underground". It is your own interest to keep the Patreon site "crystal-clear". At least publicly accessible part of your site.
But if the devs wanted people to find their sites using Google, that's exactly what happened. People found their sites. People from PayPal, Visa, Mastercard