Stay away from website with a pyramid scheme. The payout to members depend on the incoming cash flow, wich use the money invested by new members to pay the old investors. When the new registrations and money invested start to decrase this is where the problem start. Of course, you will find "great" reviews from the exisiting members, telling you can make 0.01 BTC daily ect, but it is because they are only interested to see you joining to 1) get a commission if you join under them and 2) to keep the wheel running so the system continue
99.9% don't stay long online. A good exemple of such site is trafficmonsoon, where is the site today? Sized by US authorities and the owner near to finish in prison