i don't understand why those game come with satisfying content in their first months, like multiple characters, scenes, locations, and then they stop and only update once a year or less, with limited content. Is it just to milk patreon money? I don't understand how it can take so long for one path on one character, when they already did 5-10 characters. Did they take 10 years to release their first version?
This is actually pretty common with all series across all forms of art.
When you first have an idea, its all consuming passionate, like fucking someone you really like for the first time. However, each subsequent fuck must be BETTER or BIGGER than the previous (this is why films in series must 'raise the stakes' or 'change the locale' in sequels, otherwise you'll get bored). Add to that, in a direct sequel (which is what each chapter is, vs an anthology like say the Predator series of films) must BUILD on what came before. So while the first entry you could literally do anything, the next entry you must build with what you already have, which is harder. Add to that how time works. Successful people generally have the most free time in early life, then hit a crunch from 30-60 where they have less and less. Work, asset management, kids and things suck up all peoples free hours.
Now I'm not saying that's what happens here. People in general give a little too much slack to this particular Dev because they like their story and they approve of the personal life of the Dev. I personally think its rather sad that in a game this large, with this slow a dev cycle, we'll never even see Lana again for a decade, except for Lady Mad's chapter. Buuuuut, the game is also released for free and in my experience its never the paying customers who bitch about the Devs being 'milkers' and how the patreons are idiots getting scammed. It's almost always the thieves who do this. So take that as you will.