Either SR was a gov't limited hangout all along, or they were able to close the site but still have no idea who DPR is, so they made one up. My guess is that it was a limited hangout all along, and this Ulbricht guy is just another actor.
I just don't see an actor going to jail for years. Why?
Money
No point for government to pay someone to go to jail, seems like a waste of time and money.
The powers that be wouldn't need to send their actor to jail. It's just a face and a name - there's millions of 'em. They made up Adam Lanza, I'm sure they can make up a fake dude as DPR.