1 BTC for 2 gh/s for a mining contract is 70 usd per gh. This sounds expensive.
Also what mining equipment are the using? What pool do they mine too? No information on their website about this.
This looks like a ponzi..
For an unlimited account it is 1 BTC. I bought a 1 yr contract for .6 BTC which comes to a little over 40USD per gigahash. Compared to Minerlease which gives 5G/H it is a little more expensive, but their contracts don't start until April 2014. So, I the cost is worth it for a contract that is mining now. But to each his own.