"Yes your honor I'd like to file a claim against bitvestor for infringement on our propriety concept known as a 'Ponzi-scheme"
*handcuff clicking noise*

That's like calling the cops because somebody stole your bag of crack.

I'm sure some people will make profits with this but it's only a matter of time until this turns all bitbond-y and the SEC is taking action. I haven't done a whois on the domain but if either site has any connection to the actual owners of the funds then i'd start sweating if I were the owners. Just because you put up a risk of loss disclaimer doesn't mean you are off the hook. Again, that'd be like a crack dealer putting a warning on their bags "may be addictive" and expecting use that as a defense in court.
From SEC.gov:
"With little or no legitimate earnings, Ponzi schemes require a consistent flow of money from new investors to continue. Ponzi schemes tend to collapse when it becomes difficult to recruit new investors or when a large number of investors ask to cash out."

Let me fix your post while i'm at it: