Sorry to interrupt you but this message of yours has skipped out of reality. If you take a look at his patreon you will see that there are currently about 600 paying supporters. If you keep in mind that the lowest 1 Dollar Tier will get you the latest game only a few days after the highest tier (!) and that there are no other differences between the tiers (not counting a few extra renders on patreon), it is kinda safe to assume that a lot of these 600 supporters will be on lower tiers. So when estimating the developers real monthly income, it doesnt end in heights were the developer will get rich from this. It would also surprise me a lot if even in lower cost areas he gets enough income from this to work fulltime on it.
Is the developer working on the game ? Yes.
Is the game developing slow ? Yes.
Is the game getting regular (!) updates ? Yes.
Is the developer lacking a bit of communication with his patreons as of progress reports ? Yes.
Are you forced to support the developer ? No.
Is the developer scamming people ? No.
And most importantly:
Is the Developer making a good job with the rework ? Yes, absolutely.