They have made games before, finished it. And they don't follow the usual milk the Patreon with updates each month that does not add anything of substance, but are actually trying to make a game with gameplay (regardless if you enjoy it or not, they are not just adding a sex viewer like some other 3D games).
The update before this also took months before they put out a new playable build, the expectation that devs need to put out an update once a month or so (build not just a post, talking with your customer base is important and they are not doing the best there tho.) is destroying the market with the trust issues they are creating.
If you post updates once a month it has "too little features added" but if you put out a build once every 6 months, they are too slow and should quit. They are treated as scammers regardless of what they do.
While I agree that they need to communicate more, the need for a "playable build" once every 1-3 months is dumb, most indie/porn devs are 1-5 people. That is not a lot and they oftentimes work 10-50% of their time on the games, so expecting that they are working 40h/week (100%) and push out updates often is ridiculous, making games cost millions unless they are small in scope or have just one person working on them. And if they are one person, it takes years for a game to come out.
This team got the same crap last update when they were teasing the first 18+ update, people were thinking they were lying and nothing would come, then came the update and people complained instead about the "lack of sex scenes" when it had more added than the sex. I get it's a porn game, but some want the sex as a side to whatever they are playing.
This game looks like it will be quite good once its fully out, but calling it abandoned and a scam for not meeting your made-up time expectations is just dumb, let them make the game, if they have gone over a year with even a post on Patreon or steams dev messages then, I could consider it abandoned. Not when it's been like 2-3 months since their last message showing progress to the game.