I must say, these sites fascinate me a little bit. I stumbled across this one from another sites chat.
Non referral: bitzilla.io
Referral: https://bitzilla.io/?ref=Greatiam
They pretty much guarantee you will double your bitcoin in a month!!!
Has to be a ponzi but I'll ride the train for a little.
I only put .003 BTC (at the time, $4) in just to see what happens.
I made my first withdraw yesterday. While it was not much, the payment was in my wallet very fast.
At the current rate, I am making .00000480 BTC an hour...just by letting my original .0003 BTC sit there.
If you're into making cash off these sites, this one maybe a good one for a little.
As always, PROCEED AT YOU OWN RISK!!!