Nice job with Genfanad! That looked like a really neat game. I don't have a good plan for profitability other than try to keep my expenses as low as possible and see if I can find some way to scrape by in a year or two.
A bit more serious, I haven't seen many attempts at just making a donation bar showing how much it costs to keep it running per month? Let people donate until the bar is filled, when it overflows it goes to next month. Very visible on login screen. In this bar ofcourse include your salary for keeping it running after developement is doneish.
Maybe stretch-goals for donation to make new functions?
And please use Ko-fi for donations, much friendlier and less cutting into your profits :-)
I would want, in exchange for that, that the game be fairly stable, that there be things to do such as Quests or Tasks, and that I could enjoy the game for maybe an hour a week, maybe 2 if I'm in a rut.