Yep, sometimes you see a good post and subscribe without thinking twice. In a month it doesn't make sense to go to feed, because of sheer amount of crap people produce after just one or two lucky posts. And about good authors leaving... well, I believe we have quite a few problems here, that everyone knows about and all of them hurt the small users.
Yep, like most people, I am concerned about the future of this platform. There are far more serious problems than low content producers leaving that we should be worried about.