You know freebitco.in but I'm going to tell you different method to earn bitcoin there . It is possible to earn free bitcoin in this website. The method which I'm going to tell you most probably will earn bitcoin . First, You must register for website.
link:
http://freebitco.inreferral link:
http://freebitco.in/?r=106031 (Please register here, It's not different for you )
When you register, you need a btc wallet adress and a password so you must have a bitcoin wallet. After register, you must 'play free play' to apply my method.
And second stage: We can play gamble in this website with our BTC which we earn here. Click multiply btc for that.
Anyway..If you do these, I will tell you martingale system.
I will tell you this system with an example.
0.00000002 is our bet and played lose now 2xbet
0.00000004 is our bet and played lose now 2xbet
0.00000008 is our bet and played lose now 2xbet
0.00000016 is our bet and played lose now 2xbet
0.00000032 is our bet and played lose now 2xbet
0.00000064 is our bet. We won.
It's hard to lost six times but if you lost, you should do 2x bet more.
Anyway;
0.00000002+0.00000004+0.00000008+0.00000016+0.0000 0032+0.00000064 = 0.00000126 (spent btc)
0.00000064x2= 0.00000128 gained btc. profit=0.00000002
If you start with 0.00000008, you will earn 0.00000008.
If you start with x, you will earn x.
Sorry for my bad english.
Source:
http://vegasclick.com/gambling/martingale-betting-system.htmlthats all.