Actually, there *is* a reason, and it's not quite as sinister as we feared. Not long after forming the region, myself and a couple of others were also concerned by this, we did some digging, and found that alot of the "guests" were in fact search engines (I believe the one we found at that time was yahoo, but I'm sure some of the others take a crack at it as well)
Couple this with our often times massive recruitment drives, which will bring in a good number of new players checking the place out. Often times we send out over 300 recruitment telegrams per day (hell, i've probably sent out that many myself today alone).