In 2009 more virtual roses were sold in the UK by Flirtomatic than real roses by Interflora

"The currency has quickly found favour among the growing and increasingly engaged online gaming community – and not just inside Facebook, the world's most popular social network. Flirtomatic, a social network with 1.8 million users in the UK, sold more virtual roses last year than Interflora sold real roses. Earlier this month, more than 100,000 Flirtomatic citizens "attended" its virtual firework display – online."
Source:  The Guardian, 19th November 2010
Via Interesting Snippets