Unrelated but worse problem: top of feed livelock. If you're below the fold, cause, I dunno, you got shit to do, you are only going to get viewed by heavy scrollers, which overly favors (IMHO, as somebody with shit to do) folks who get on the thread first. Even a one-dimensional "rank by number of uplikes" filter still doesn't calculate your likes/views ratio, which is what you'd actually care about.