1millionusd.biz What a pretty site this is. A complete scam, but well presented. 29/06/14

12level.com - all you need is 12 more suckers to sign up and you probably still won't get your funds back. Sad isn't it. 23/05/14

120cycle.net - Offers 120% return. How?  Ponzi or Scam, take your pick, or choose both 26/03/14

24 Exchanger & X Exchanger & JR Money Exchange &  First-exchanger & Zeo Changer and J-Changer
All the same scammer 03/06/14

50BTC.com - The mining pool. It has stopped paying, and it looks like the host has done a runner. 16/06/14

5555BTC or 
freebtclottery.pixub.com/home/
Despite the claims - no reason whatsoever to trust this. No site contact either. If this is your site - get in touch 25/05/14

Want to see more of these scammers come back soon.