I agree that over .5 BTC its not worth it.
At 1 BTC and 20% diff increase you never ROI.
After around 120 days you start losing money on electricity and at this moment you lost a grand total of 0.4452 BTC (not even close to ROI...)
Why is everyone spitting that 1 BTC price ? Please get your head out of your ass.
All this if you had the S3 TODAY.
In US dollars they could sell these for 99 bucks a piece and make a huge profit.
So fucking what ? The cost is not even in play here.
You really don't understand the point? Cute :-)