As my previous experiences from bitminer.io I strongly confirm that this site is really a scam site, and highly warns everyone who are newbies of bitcoin system to stay away and don't invest time and effort on their so called web miner. Everything in your expectations turns to nothing and worthless due to time consuming and a non sense way of web miner. After that disappointments happened to me, It takes a long period of time to move on from that experience so far; and promise to myself not to engage in any cloud mining ponzi's.