1. It offers 15 KHs for free for every new user. They gives about 0.0001BTC daily. (But to aсtivate payments you have to buy contract).
2. Wait 200 days (or less if service will have some discount offer), collect 0.02BTC on balance and buy minimal contract of 20 KHs.
3. Having 35 KHs you can earn about 0.00025BTC daily and request payout every 20 days. Minimal payout is 0.005BTC
Of course this scheme will work only if service will be still alive in 200 days I hope it will.
p.s. I bought minimal contract several days ago and hope to test how they pay in next 10 days.
" If you do not purchase additional powers within 30 days of creating your new account, your free powers will be deactivated automatically.
Your free powers will be activated automatically after any additional powers purchasing. "
Anyway don't even worth to try