[flagged] means flagged by users; if it was done by the system, it'd be [dead].

I can't speak for others, but the reason I flagged it is that the number is untrustworthy and absurd. This is not an isolated case, Statcounter has these ridiculous errors on a monthly basis on one stat or another, before they silently fix whatever was wrong and the numbers swing wildly the other way. A discussion of a Statcounter spike is as fruitful as a discussion about the output of an RNG.