Probably won't go to that extend. But it might not be a game for you / me anymore.
An example of "sell out" game still striving is Lust by Uncommon Breed dev - it's still reeking money and going strong, just not for the public anymore.
Another Big competent is the art of this game is actually
way below average.
It works with Aliens since they are obsolete in the first place, the art-style synergizes very well.
But not for conventional attractive humans, likely the reason many feel "Ugly Human turning me off".
(There are actually tons of "human in space" porn games with much better arts, non-human ones are super rare)
Keep in mind, the Dev hv every power if they wish to change,
the autonomy is still entirely in their hands - simply stop selling more self-insert slots, and filling up alien contents that hv been negated forever now.
The fact is they don't want to change, but further into the money side.
Patreon don't hold them hostage, but the desire to get more money does.
Edit: Just realised "Magic School" makes adding self-inserts much easier