Its happened twice now I think. My hit-counter jumps up a load and when I go to check it with SiteMeter, there's a big spike, and loads of closely timed visits all claiming to be from different blogs that don't link to mine.
Is this some kind of viral marketing ploy? Visit spam? Maybe its a SiteMeter feature? Designed to give you a warm, fuzzy feeling inside because people seem to be reading your site?
Does anybody else use SiteMeter? Is it something I should have known about?