I checked on my side, but it turns out that it's more like 6 updates in 2 years and I only counted the major versions, which makes an average of one update every 4 months.
I think that for a game that requires a fairly meticulous finish, with only one artist capable of creating the scenes, we're not doing too badly.
As for the 16k$ per month, I think you're mistaken, a third of this sum is used to pay the people I work with, music, assets, animations, code.
Another third goes to taxes (France is the world tax champion).
And the last third is divided into 2, one part for me because I need to make a living, and the other part is kept for the company's cash flow (very useful in case of unforeseen circumstances or if I want to hire someone else).
So it's not because $16,000 is written on the patreon that I'm injecting that much money every month, only a fool who doesn't know the value of money would do that.
So please, stop drawing conclusions that are a little too hasty, I invite you to work in game development so that you can get an idea of the reality of the situation :)