I liked the boring vanilla too at some point, after 5 years it gets, well, boring. That kind of content is literally free everywhere, there's no need to go to Patreon and pay people to make more of it. That's like Eskimos going to a gas station in Anchorage AK to buy a bag of ice. As far as appeasing people, it's simple, including everything but make it all optional. Don't like lewd lolis? No problem, just don't apply the patch or simply choose not to groom the lolis when meeting them (SS doesn't need decensor patches). Same for any other kink: don't like scat = then choose to refuse to eat an LI's shit or don't shit in her mouth when she offers or asks, don't like beastiality = don't agree to have a threesome with an LI's dog and don't give her permission to fuck it when you're not there either, don't like NTR = then don't put your Li's in questionable situations with other dudes or another girl they are crushing on/getting crushed on by, etc. It's not brain surgery and usually pretty intuitive for the successful AVNs on SS with every kink imaginable. Some simply have checkboxes for kinks to include/not include in the options menu.
I mean, I do play games where there's optional incest for example. Not my cup of tea, so yeah I do agree with you saying that making some of the stuff optional is a decent way of doing it to please a wider audience. BUT, most of the games with all kinds of different fetishes usually come with drawbacks in other areas. Because adding more fetishes to a game results in much more work as the developer has to write extra dialogue, create more renders, plan for more different routes. Also, some games tend to aim for a somewhat realistic story, and in those kind of games certain fetishes would be just...well, stupid.
In a perfect world, every AVN would have content for every pervert walking our Earth. Unfortunately that's not the case, and t4bbo is a solo developer doing most of the work. Adding more content means longer update cycles or smaller updates in terms of render count for each route. Either that, or he'd have to cut down on render quality, and that's probably the last thing anyone wants to see. Another option would be to hire a team of artists to produce more content, but t4bbo isn't exactly making the money required to hire artists in his bracket...in terms of skill.
The closest you can get to incest in Babysitters is the route with MC + Angelica, his wifes daughter. I guess he could have made her MC's actual daughter, but that would have t4bbo run into problems with Patreon. In the end, a developer can't please everyone but there's always other games to enjoy if this isn't what you want to play!
