You're acting like you have no agency in the matter. Honestly, if someone isn't delivering, I hit that unsubscribe button. I don't see why you would stay subscribed if someone isn't posting. "A fool and his money are soon parted...." At that point, it's more like you're scamming yourself if you're not getting the new content you want.
BTW, OF tells you if there's new posts since you last subscribed. I haven't subscribed to him since the spring, and it tells me there's only been *one* new post since I unsubscribed. There's no way I'd give him money again unless he actually commits.
I'm not trying to defend his flakiness (he really should update his OF bio about updating multiple times per week since it's pretty dishonest at this point), but there's also no way I'd stay subscribed for more than 1 month if someone starts to neglect updates.