Yeah IMHO it walks the line between ponzi and pyramid scheme, so you'll either have the SEC or FTC coming after you. e.g. FTC has been hassling MLM schemes for years and they argue the differentiator is the fact that there's a product involved, but this clearly does not have a product, so best case the FTC shuts it down, worst case the interested agencies will include FTC, SEC, U.S. postal service and local and state equivalents.
Bit more data on the FTC's opinion:
http://www.ftc.gov/public-statements/1998/05/pyramid-schemes
Incidentally a pyramid scheme almost took down the Albanian economy and sparked the 1997 rebellion.
I suspect BTC investors are a little more sophisticated, but given the pseudo-anonymity behind cryptos, I wouldn't be surprised if something like this doesn't wreak a respectable amount of havoc in the future once cryptos are more widely held.
PS: If the site author's reading this, I'd start hitting the 5x5 stronglifts hard with a good bulking nutrition regime. You really want to hit the ground in federal prison with a size advantage. So I'm told. Can't wait for the AMA.