German online games publisher and developer Bigpoint made over 2 million euros of revenue this month on a single in-game item purchase.The company's free-to-play MMO space shooter, which launched in December 2006, has seen 66 million registered users in total over its five year life.Earlier this month, BigPoint sold a special in-game item called 'The 10th Drone', which cost 1,000 euros to purchase, for a total of four days.Simon Davis, producer on has now told Gamesbrief founder and Gamasutra contributor Nicholas Lovell that over 2,000 of these items were sold, meaning that over 2 million euros was spent on this single item over the course of four days.Back in June, Bigpoint signed an agreement with Russian service provider Mail.Ru Group, allowing both companies to share their games via both of their portals.As part of the agreement, Mail.Ru users are now able able to log in and play select Bigpoint games via the Russian service, including