They create a virtual currency, even if it is decentralized. This includes creating altcoins. In fact, Satoshi would have commited a crime creating Bitcoin without registration. (200.2n5)
I don't agree with this interpretation.
200.2m: Virtual Currency means any type of digital unit that is used as a medium of exchange or a form of digitally stored value or that is incorporated into payment system technology.
200.2n5: controlling, administering, or issuing a Virtual Currency.
So, by their definition, VC is the currency, not the protocol. Satoshi has published Bitcoin the protocol, but he has never "issued" Bitcoin the currency.
Mastercoin and Ripple could be in trouble, though.