It's not really milking when it takes ~5 years to make at least a decent-length AVN that doesn't suck.
With few exceptions I generally don't care much for short stories or even 1-release wonders made just for a cash grab on Steam that last all of 30 minutes like most don't,
I quickly forget the AVN or even the dev exists after finishing it.
Ones I've seen that get done in a year like Daniels K's stuff tend to be "well, that was disappointing" and more often than not with rushed endings.
If you really want a good example of milking try playing Summer's Gone; 5 years+ and still hardly anything there and when a decent H scene finally happens (MC's sis Nami giving him an ass job)
after 4+ years Ocean removes it the following update just to avoid an adult rating on Steam (when up to that point it was supposed to be a fucking porn game,
which if it's worth a shit as such it supposed to have an adult rating).
I never was a sub due to the 8-10 month release times and lack of decent H scenes but if I subbed to that for 4 years only to get a royal "fuck you,
Steam sales are more important now than you or your support or what you want" I would have been one pissed off mofo instead of just annoyed and unfollowing it.
Grandma's House is another one.
Sometimes a story takes a long time to tell, but that one the story was simply left to gather dust in the background
(not multiple story arcs with one ending as another beginning like a 10-year TV show often does, just ending with no new plot),
now in the 5th season after grandma finally got fucked (I was sure she was going to die from old age before that happened) Amy still has yet to take her nephew's cock.
Aside from that updates are just a few H scenes of the month, no plot to really care about anymore and that's been the case for years
(I quit bothering a few updates after the MC rescued the asian kid and her mom, that was the last major plot point that I can remember besides just fucking).
Dunno why people are still paying money for that crap, I mean I guess from a dev standpoint why stop if those dummies are still all
here, keep taking my money because I'm even stupider and even more easily amused than I was 3 or 4 years ago,
you don't even need to write a plot anymore" and a lot of never-ending AVNs are in that situation where it's beating a dead horse,
just new LI's to fuck added.
Hell the top AVN on Patreon is 9yo and still going.
I never did get into it because it was a sandbox with 2d cartoons and no lolis among other cons but even if I did I'd be sick of it by now.
SSP is far better than any of those, and at least it has an ending in sight, even if it is only about half done (v12 is Season 2 that prob ends in another 2-3 years, and prob won't be a Season 3).