Spam flagged posts should show better text than this
I'm guessing it's a "mystery" flag. Like a mystery shopper - a random invisible flag that's sent to evaluate how we respond in an unknown situation.
Just as long as there's a bonus1 I guess that's OK ;)
1(I once got a free pen for passing a Microsoft mystery shoppers test. It wasn't very hard. I worked in a dingey computer store on the bad side of town and this incredibly attractive young woman walks into the store (giveaway #1, most of our customers were men and immigrants who had spent less than a month in the country, which was why they were coming to the only place they could afford) and clearly knew nothing about computers and goes "So, umm, I want to buy Windows XP, but I'm not sure if I should buy Office or not. Can you tell me what the differences are?")