So, I just registered on PBMining. I am thinking to buy 1 GH/s but.. it look like the minimum contract is 25 GH/s for 5 years. Please correct me if I'm wrong.
Your right, 25 GH is minimum to buy. 1 GH would mine only under about 0.0001 weekly, so you would only receive dust weekly and it could cost more in fees to spend the dust
Oh.. thanks for clarifying it. I will reconsider whether to buy 25 GH/s from PBMining.