I'd go into the front page and New and flag any instances (often duplicate ones) I saw. I saw at most 2-3 a page that way. Considering how slow those load during lunchtime for me, I wasn't flagging any unreasonable amount.
Maybe there's only so many flags a day you can make (and I didn't just flag for sources) maybe it's the sources I flagged, maybe it's something I can't even guess that was mentioned at some post at 8am in the morning one day.