This is casual that most mining sites are just wasting time then they grab some investors and investment and suddenly close the site. Real mining is purchasing anti-miner hardware and building your small farm of mining or the site is consuming your internet data for a small reward. But these miner sites are in reality a new form of HYIP scam. Then do not waste time and data for just such signups because there is no one how is offering money for free signup and use of hash power is offered also for free it is for beginners so take care.