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.

(http://gyazo.com/678f430e7674f10225877bdef3b71da1.png 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.