I think people are cofusing two different categories of porn game here, and it's worth disambiguating:
1) Patreon/Subscribestar games, aka games that you play monthly (or less frequent) updates for. It's pretty uncommon for such a game to be able to pull off gameplay and be a good porn game at the same time without making players super frustrated with the potential long wait time between updates. Generally, the only kinds of games that can work in this fashion with anything like gameplay are resource management-focused visual novels with very minimal actual gameplay elements (Mystwood Manor, Straitened Times, Summertime Saga), the lo-fi run-or-rape sidescroller games, and HTML games where the bulk of new additions is usually writing or easily-sourced IRL porn images. If you want something more complex, either the gameplay systems are added very slowly (World After War's combat still is barely implemented, and that game has existed for almost four years) or updates are months apart (SuperPowered/Loser, Peasant's Quest, Legend of Queen Opala Origins). Since most devs aren't good programmers anyway, that tends to mean that you're waiting a long time for them to learn how to put something as simple as flappy bird into their game (which is usually out of reach of such devs' skill and patience).
2) Porn game studios. These either already exist, or they build up their resources releasing smaller games before they're able to make a bigger game, or the dev is just multi-talented and recruits more people. People seem to forget these exist, but c'mon. Leisure Suit Larry. Brave Soul. Kamidori Alchemy whatever (and the better Eushully games, of course). The Lula games. True Love. Either the porn games you play or the inspiration for the porn games you play probably come from the work of these studios, and some still exist. When what you release is a full porn game for full price rather than depending on keeping a subscriber's interest, you get the time and flexibility to make something closer to actual gameplay, and that's awesome. Not every Patreon/Subscribestar can make those, and that's fine, but I'm not here to support Patreon or Subscribestar or whatever. I'm here to find good porn games. And sometimes I find out about a game made by a good studio and buy their game instead of playing some monthly-updated thing here. Variety is good. That being said, studio games tend to be a little wussier on tags like incest, and their sex tends to be less hardcore, so there are still trade-offs.
Still, I clicked 3. I'm actually fine going up to 1 if the game has good enough gameplay and porn, but 3 is the sweet spot for me.