I discovered this game when it was at version 0.5. Pledged for 2 months and started seeing a big drop in communication since then and stopped pledging. I pledged again when 0.6 was out. I totally support deserving devs. If I ever pledge again for this game, it will only be for major updates.
If he is getting 30k-50k money every month for doing next to nothing, why would he even want to work further. Just think about it! Don't tell me because of work ethics and all (we all know how his work ethics are). Business is going really well for him. Hardly putting any investment, and returns are super high. He can pull this for 3-4 years easily at this pace. Man, if I were him, I would be on vacation mode all the time! I would only want to work if I see that my earnings are dropping. And its not like he is obligated to deliver anything. Nothing is guaranteed. You can only trust a dev by their promises and history (again, we know here how many lies were told and promises broken). Hardly any of us knows him directly, and that makes it so much easier for him to get away with all these.
I still think updates will come but its gonna be super slow. Its a waste of time waiting for it. If it comes out, then good. If not, well at least I have not been throwing money in a pit every month.