I started using pbmining in Feb this year and from my calculations I am now in profit - well I hope I've calculated correctly.
I used pingit to pay for bitcoin to get the contracts - my pingit shows I've spent £34 on bitcoin and from the contract screen I totalled all my contracts worth so far and its over the amount I spent..not by much but its profit.
The money I made back from the contracts were re invested in new contracts - so far I have a total of 37GH which isnt much but I was really just testing to see how to service was.
I'm customer no 443
I have 856 ghs for test in PB and 2 ths hardware on my balcony . In September plan to add 10-20 ths minimum if pb will stand as strong as it is now I'll buy that 10-20 ths from PB.