No the author can cater to everyone's desires as long as it's optionnal.
But what is true is both "sides" would then complain that MrDots is waisting time making content for the other side.
Maybe he could have gotten away with it telling "the Vanilla story ends at this point, we've done all that was possible to do with the D only path, now next chapter will be mostly sharing and weirder sexual fetishes".
And then there's the Vanilla extremists who cannot even bear the possibility that content they don't like exists, even if they can avoid it. You know, these people taking games for reality.
The issue being that Vanilla lovers seem to be the vast majority of people who actually pay. And for knowing someone who has a business related to 3D porn, and who knows other creators too, Americans are like 80% of paying customers. So they are a blessing because money, but an issue for others because they love Vanilla so much.
So please Europe, Asia, Africa, Antarctica, South America, Australia : PAY THE FUCKING CREATORS ! So all the subscriber based porn content in the world doesn't become boring Vanilla.
We could also wait 20 years until Americans get bored of Vanilla, but then maybe their kids will pay for more vanilla