http://www.oneworldcoin.com/?ref=bb4740f8e1
sign up and win from USD$5 to USD$50! 
for 5 referrals win $5 
for 10 referrals win $10 
for 25 referrals win $25 
for 50 referrals win $50 
Among the top 10 users will be awarded $ 1,000 ! 
OWC is an russian exchanger - Bitcoin/USD 
sign up with this invitation link. just put your mail and invite friends