Well while you all are at it, also look up virtual currencies in games. You know what? I looked it up for you. And here it is:
"Predatory virtual currency in games
involves manipulative tactics like hidden costs, layered currencies, and time-limited offers to pressure players (especially children) into spending more than intended, which cause financial harm. Regulators, like those in the EU, are cracking down, forcing more transparency and better disclosure to protect vulnerable consumers from these “addictive designs”.
Oh my, and just look at what Blizz wants to do with Wow: