> As far as costs, you understand that people do thousands of tasks on mechanic turk for pennies right? You still have to invest either your time or hire someo

> As far as costs, you understand that people do thousands of tasks on mechanic turk for pennies right? You still have to invest either your time or hire someone to set things up for the mechanical turk setup - the opportunity cost you pointed out earlier. And pennies per turk isn't worth it if your ROI is micropennies per turk. Depending on how much friction there is, it may be cheaper to trick your turks into running the bitcoin miner on their own computers. Not saying there's no potential for abuse - as you say, there is - but saying there's "no costs" and that "You literally can't lose" is about as accurate as saying there's "no profits" and that "You literally can't win". Unless CPU bitcoin mining is wildly more profitable than my understanding, given that you're competing against GPU and ASIC miners. Maybe one of the alt-currencies that are supposedly harder to GPU mine...?