One of many websites that offers mining services with low coast and high gains.
It has 5 versions as you can see v1 is the free one and the other 4 you have to pay for it.
At first i signed up for the free version which send me nothing then i created a new account and singned for version 1.1, as you can see in the picture below they only sent me one time which worth half the btc i paid for this version, so my advice is not to join this scam site.