I really don't think that your conclusions are right here and i wish i was paid to say that.
I'll repeat myself, but again, look at why we are waiting now: Nomo wanted to draw something with Sabia and Amelia because it has been teased for so long. He
wanted to make something for this game. And despite all the valid criticism, Monsinne apparently went berserk on writing content for this art, so much so that they moved it up from a bit of sidelined reward to a part of the main story and more.
There is the drive and motivation in the devs. To me it seems they want to keep making this game.
But i understand why i'm in a minority with my views. Coming back again to our current situation: We are waiting for an update to drop. When? No idea. What is in it? Well, some content that we don't know exactly from 0.12 have been carried over and some kind of bar content is being added to it's end as we speak. But what is in the planned part of the patch? No idea.
So we are waiting for an outcome that we can't predict to happen sometime we can't tell yet. Essentially, being invested in this game with either money, time, effort or anything else can feel a damn lot like gambling, hence the feeling of milking.
But i can't assume that this is intentional. Because if it is, then the dev's master plan was to create a bad feeling in the players and patreons in order to get less money. That just doesn't even work for greed either.
In the end it is still a problem that they created and they have to solve it.