Earn almost 0.04 BTC every month from
http://www.earning-surf.com/?ref=11155
the free auto surf site that pays in bitcoin
Standard member: (Rate: 0.00001200 btc per site; Allow minimized: No)
100 sites per day, 15 sec. per site
You can cashout at 0.04000000 btc
you can upgrade account for more profit
just keep page maximized while it surfs
you don't even need to be on the tab you can watch, play, or  
do other stuff
Different but similar to 
http://www.surf-profit.com/?ref=11928