This site, BTCpool,is an online mining site for BTC, they do all of the mining you sign up and you get a small amount every day. Yes, the idea is to have you upgrade so you can earn more. I joined it and am receiving a little BTC every day. I am not yet at cashout so I certainly can't tell if it is legit, but I spent nothing here so I won't lose much.

I guess I can reach cashout ( about $20.00) in one month, so until then I can't really vouch for the site. But like I said there is nothing to lose by just trying it out. They do have a nice referral program.

Check out this offer, or LOGIN first to get click credits for your browsing!:
=> https://btcpool.io/224871