JOLTCorp.io was a cloud mining site. that it put it into my [ Watch List ] . They will give you 10 KH for free. so you can begin mining. but don't have confirm mail when you register. it's a little weird. however i registed. and it's seem begin mining. so let's see what will happen later.
There was a Post Warning JOLTCorp.io was a SCAM Site. that you may interesting.
2016/11/15 : it’s stop mining. that mean free mining only can get this much. and withdraw need more than 0.003 BTC. other words, if i don't deposit to buy more mining power then i can't withdraw anything. i guess.