You guys are nuts, I personally know the guys over at Polo (been to their office).
This is FAR from a scam. In fact, it's already back up and anyone that panic sold on a separate exchange will get royally fucked.
Well anyway, they have some problems. They were online, but are offline again already. Just saw that they've updated their terms of use, but before I could look it up to see what they've changed, they were offline again.