Step 1:
Simply register using your bitcoin address at https://freebitco.in/?r=3646544

Step 2:
You can earn up to 0.07 Bitcoins by Free Roll depending on how much you roll in every 60 minutes

Step 3:
After Free Roll, a window will pop up giving you the chance to multiply your reward. You can try your luck or simply ignore it to save your bitcoin.

Note: if you have a balance at least 0.0003 BTC, the website pays 4.08% daily interes on your balance