The author makes 3-7k a month, at the top end, and has slowed since then. Don't support a creator that just want money. Origin was supposed to be completed by 2016. Just to give you a idea..
I kinda get the idea about how frustrating people while they give the money for the dev hoping for making the game better, but what's the point when the game is free? he ask for donation only and it's up to us to don't do it if we can't afford to, so why we give the monthly donation from the start?
Maybe for the situation like "hey, I give you stuff, but you need to pay it in shape of form in order to get it", we got baited and he ditch it. That's when your perspective is legit and you can rant as much as you want. compared to "hey I give you this for free, if you like it, donate if you could but if you don't, it's okay", we have no right to demand something much based on that we donate for it. or worse, we demand it for more but we didn't even donate for it like an a**hole.
I'm not trying to defending the dev for this since I didn't give a single penny for this, but try to think before you doing something because we can only blame ourselves for it. That's why this website forum F95zone is the best thing to get some info about the quality of most content, to give you the idea about "do you want to support them or not?".
That's my view on this, and don't take it personally, as I try to respect to others as well.