I am only recently aware of Patreon because of that V-lang stuff that has been hyping around on Reddit and here; this however seems very interesting to me. In my spare time I have been working on something similar for a long time but this looks, at first glance, clean and well done compared to my own efforts. Will have a play when I really wake up.
Another nice one (again imho) is [0].
[0] https://www.patreon.com/csaba_hruska