5.5k$ per month x 3 = ~16.000 dollars per update with less than half an hour of content if you were to remove the forced 2-3s fadeins and 3-10s+ forced loading of all textures for each scene that he refused to ever optimize + bug ridden game every update + refusal to ever implement the full gallery and all of that after literally 6 years of development of this game and then switching to a new game with all the same problems as above while marking this game as "finished".
Your mention of ICSTOR or DarkCookie I agree with, but they are the bottom of the barrel when it comes to finding other low bars to compare any dev to anyway, basically every dev that gets similar success goes the same route, they see they can stretch content they used to make in one month to 3, 6 or even more and earn that amount more money while still getting more supporters every month, they will all do it.
WVM developer was one of the few that delivered every other week the same content all devs deliver in a month for a long time until seeing he can do the same as above, and basically went radio silent since. Now one of the only devs that does frequent and solid updates for games similar to this one is the one for Grandma's House and also Hero Party Must Fall, Desert Stalker and Hot Sand of Antarctica devs for longer dev time content drops.
Without patreon and similar services holding devs accountable to what they promise to deliver we will forever have this slope of regression but given they all profit from it this will happen as long as the users themselves allow it through their wallets.