Mobile social network Flirtomatic (“the world’s number one flirting company”) today announced somewhat of a milestone: It's passed the 3 million global user mark and, perhaps more noteworthy, recently surpassed 1 million users in the U.S. Furthermore, citing a study by the mobile media measurement firm Ground Truth, the London-based company says that over the summer, Flirtomatic accounted for 65% of the season’s audience for mobile dating in the US (I didn't know dating sites had seasons), out flirting traditional players such as eHarmony and match.com . That's impressive although it also speaks volumes to the vulnerability of said players, many of whom charge for access as well as an additional premium for mobile.