By 'No Hidden Fee' I understand at 0.001 BTC you get exactly 1 Ghs and there is no hidden cost to inflate the price. That is what they are doing. I could not find anywhere in the site, which talks about zero maintenance fee. Rather note in their mining calculator clearly indicates that there are some fees before actual payment. So, I am not buying your arguement that no hidden fee has anything to do with zero maintenance fee, which you are trying to force on them for some unknown reason.