Really? You obviously have zero business experience because anyone who has the least business experience knows that to expand busainess you have to spend money on infrastructure. It's called a "sunk cost".
Just how much do you think it costs to make a game each month? If the dev (any dev here, not bad-mouthing Sin specifically) was living off (let's say hypotnetically) $35,000/year, and with Patreon they could suddenly make $60,000/year, don't you think with the $25,000 'extra' they couldn't afford to upgrade the equipment needed to make the game?
Or are you being self-centered and assuming that trhat extra $25,000 doesn't need to be reinvested in the "business" at all? Maybe that dev is ok to spend all that extra cash to make a live-action movie for themselves with porn actors (*cough* Sunset Riders *cough*) and not actually, you know, show return good faith with your supporters and show them that their patronage of you will reap real, improved delivery rewards, and not just selfish, self-centered benefits to the devs only?
Look, 4-6 kick ass PC's can easily be built/bought for less than $1500/each. Considering some of these dev's are making 10X that in a MONTH I don't see where the reinvestment in improving production of the game , which would get more people to invest as a Patreon, is a negative benefit. Or perhaps the dev could delay releases or decrease the amount of content each month, which would in turn cause the high patreon subs to stop their support. Seems like improving/increasing the capacity to add more to the game is a win/win and no brainer situation for any dev once they reach a certain amount of Patronage.
Then again, look at DS and all the idiots that give them money, so you know, there are suckers born every minute.