You realize you contradicted yourself in that very first sentece right? BECAUSE they earn so much money relatively speaking, its a drive to progress the game and keep thoes earnings or have them go up even.I bet they gonna end up cancelling the game, or never finish it. Theyre earning too much money with patreon and getting lazy.
Further, once the game is complete they plan to go for steam and we all know how much more money is to be made with a decent game on steam sales than on patreon.
Also what makes you think its like all those other games? Did any of the other games establish a whole studio and a legal company? Did any of the other devs care to show their real voices and even faces and names to the public in videos speaking about the game? If all that still makes you be just as faithless as with all the other supposed abandonware games and scams then that problem is on you buddy.