If you buy the S2 for 3.769 bitcoins you'll ROI sometime around summer 2015 without factoring in electricity
Who is buying these fucking things?
I'm using mine to build a robot, I assumed that's what we were all doing....
Nah, I am here to produce a localized decrease in entropy while increasing the entropy of the whole system.
choose from the following:
1. It's a service to fellow bitcoiners
2. It's fun
3. You learn new things and hopefully escape future Alzheimers'
4. it has a potential to earn some money if you buy at low bitcoin price, rebuy the coins, then sell coins at higher price or use them to buy new miners
5. machine will, hopefully, have a residual value after 2-3 mo
6. I paid less