E-Sports Entertainment is a gaming community on the internet. Its custom client software is designed to detect cheats, such as programmatically automating tasks that are supposed to be a battle of dexterity between human opponents. ESEA has been accused of using the client to mine Bitcoins. The company had toyed with the idea of using its customers as a giant bot, but decided not to go ahead and ran a Bitcoin farm on ESEA customers computers for the next two weeks. Bitcoins didn’t actually exist until the unauthorised updates and reconfiguration were made.”]
Source: https://nakedsecurity.sophos.com/2013/05/02/network-gaming-company-builds-bitcoin-botnet/