Hi everybody, this is my first post on this forum so dont get mad.
I know the owner of that site and hes going to stop soon, I also told it to the users on this site and want to warn everybody and this is also the reason why you may not get payed out: http://leakforums.org/thread-441338

But if you dont want to get off this site here a exact copy & paste of my own topic lol:
Hi guys, I know one of the owners of the website and just wanted to warn you the site is going to stop as soon as possible.
He told me they use a wait system.
So User 1 invests 0.5 btc and User 2 invests 1BTC.

User 1 gets the 1 BTC and User 2 has 0.5 left now a 3th user needs to come and donate 1.5 BTC to double the btc of user 2 and that goes on and on and on.
And soon it is impossible so they will close the site and never appear back.
Just wanted to warn you.
Greetings,
ProSixer.

( the fun is about to begin)

Better description:
User 1 invests 0.5BTC and will get back 1.0BTC
User 2 invests 1BTC and will get back 2.0BTC but User 1 needs to get payed so he got 0.5 left and User 1 got what he wanted.
Now User 2 needs to wait for another User to deposit 1.5BTC.
But they cant pay out after a while so they will run off with the money they got and end of story.