I couldn't help but think "Bitcoin mining!" Back in 2011 I remember discussions on bitcointalk.org about giving away Bitcoin miners disguised as "heaters" which

I couldn't help but think "Bitcoin mining!" Back in 2011 I remember discussions on bitcointalk.org about giving away Bitcoin miners disguised as "heaters" which would, of course, mine for the manufacturer. So the manufacturer gets all the bitcoins without paying for electricity. Unfortunately this will never work. Space heaters are cheap enough that their price is a non-issue. Plus they are smaller and hotter. http://www.amazon.com/dp/B004AQLUHC http://www.amazon.com/dp/B004AQLUHC is $15, the size of a bread toaster, and 1500W. You can't have this thermal density from a computing device.