This is the majority of the top end patreon games, especially h games, and the primary reason why I don't ever back any that haven't proven themselves yet (like Dystopian Project), and even then I think real hard about their progress and content to time ratio.
Thing is, these projects very rarely finish or release in any more than a throwing out the trash and wiping your hand kind of way. Many of them are literally now 3-5 years beyond predictions for stuff, and then there's the 'ol famous "we took too long so we're going to have to scrap everything and do a complete do over on a new engine or with a new graphics or with 'better' features" only for the project to grind to a halt and release like no new meaningful content for years instead of finishing what they got, then building upon it for a sequel. Yiffalicious is a great example of that.
Look, I get that games need support, but the way I see it, a ton of indie devs have managed this better ways than patreon unless those other income streams are utterly and fully extra support, meaning you get squat for it in return, do well on their game, and use that to fund their next game.
Patreon "successes" by definition and design discourage a game from ever being completed. If you're making half a mil to a mil a year and have to split that with 3 people, all for a 10% complete fan project with barebones content, no 'sane' person would ever rush through that piggybank. There are literally untold hundreds of people spending 10-20 times what the final game will cost for 10% of its content and likely just as high a percentage it'll ever finish.
Like, it's some quick math right there lmao.
That's why I just don't sub anymore. I'll buy the final game to support them if it's worth it, and hey, I'm thankful there are enough whales out there happily wasting money so we get little tidbits of nice h content once in the blue moon, but that ain't going to be me chief.