This is precisely the question I asked in Discord months ago! Wanted to share my view here, too, but then the Ukrainian war happened, so I got carried away.
My impression is that femdom is a fringe fetish, and I have a hard time believing this game has blown up on the femdom community's merit alone.
JOI videos, however, are quite a mainstay. I would wager to say, the game exploits the feeling of companionship that incels lack.
This is actually the issue I find with this game's design. To me, masturbation has always appeared as a means to an end, the valve to turn for a particular emotion to be experienced while appreciating female beauty. Even more, this is what put me off the game on the first playthrough - until I discovered the psychological joy of orgasm denial. And purely visually, the outfits have gotten better (looking at you, the "socks" toggle).
So indeed, I view physical masturbation as quite boring and selfish, although the emotional is definitely fed by the visual.
Your outside shapes my inside © Dark Age
I can't if it's on Patreon. It is quite unfortunate that SuccuDev has abandoned his neat website. I hate Patreon for the mobile UI abomination it has become, I feel unwell when I as much as look at it. Being a visual creature cuts both ways.