Like I said before, the only way to get him to change is to persistently complain about him publicly to the rest of his patrons. He's gonna delete them and ban you and say a bunch of other guilt trip shit but if he gave a damn about his patrons he'd stop trying to silence them. He knows that if he switched to a per-update system he wouldn't make any more money because he's a lazy sack of shit who doesn't actually produce content anymore. The fact that he's trying to squash any talk of per-update payments means that he's well aware that doing so will remove his revenue stream and he's not willing to let go of that for the sake of his patrons. He's more than willing to take their money as a "thank you" and give them nothing in return, so unless he can justify what anyone should be "thanking" him for, he's a shithead who is scamming his supporters.
Like wootch, I've given up hope for the next update to ever come out. Best case scenario is that someone basically remakes the game like Nergal did for UrbanxLife. Shouldn't be too hard given the basic assets that Impure uses to make this heaping pile of ass and the lack of actual gameplay in Sarah's Life.