>If content generation or interaction, the core of Reddit's business, is being manipulated, who bears responsibility to correct it?

Who said it needs to be corrected? Is the Reddit CEO in the business of killing golden geese? 'Post edit' scandal notwithstanding?

Reddit profits from a combination of true believers, sophisticated attention merchants, and fly-by-night lurkers who keep the ad execs convinced that clicks equal purchases.

They don't seem to be at risk of losing any of these.