PBMining is interesting...
I don't see how they can offer rates that cheap sustainable.
0.00645/gigahash is ~ $3.22 per gigahash. 1 gigahash takes ~0.88 watts (at best, but he's been running this since before Dragons and S2's were out, he's averaging above 1 watt/gigahash). So say 1 watt/gigahash, to be nice.
1 watt, at 10 cents per kWh, will cost you $4.38 to run for 5 years... Plus rent, plus cooling (I'm assuming he's got a space somewhere running these machines, there's no way he can run 90 terahashes from a house.) means he's in the red on every transaction. PLUS, he has to make his investment back, buying the miner, which again was at best ~3.50 a gigahash.
I just don't see it lasting more then a few months.
I am an individual but i get miners at 0.006GH/s and industrial electricity is very cheap.
I can also get some money back by reselling used miners when switching to newer model and if Pbminer has some
bulk discount from factory or contract with supplier then I don't see this is impossible business model.
It's just that no details open like contact, physical address and etc. worries me to invest too much on them.
I've asked PBminer for which mining hardware they use, estimated ROI and few other questions but they replied with
insufficient answers but just general comment that no one can predict btc value...
