It works like this: You deposit anywhere between 0.01 to 2.2 BTC. You deposit 0.03 for example, and you get 0.036 in return. How long the payout will take is a matter of the total sum of new deposits. If there are plenty of money to send, it goes fast. If the admin is in need of money, it takes longer. It costs the admin 21% of every deposit. Those 21% is taken from the newest deposit. As you might have figured out, deposits need to have a constant flow for this to work. It has been working for 3 days straight now though.