I attended the last day of SAAC Vegas 2006 and the last day of SAAC 2006 at VIR. I did not see Shelby either day.
Perhaps if Shelby had a problem with the club, you would not expect to see his tractor trailer with Shelby employees at the SAAC convention? Has Shelby stopped advertising in the SAAC magazine? Not that I recall.
And why didn't I see him at his factory in Vegas? Perhaps he is having a feud with Amy, Gary or someone else?
If Shelby wanted to remove the SAAC name from the Vegas show, I don't think SAAC could stop him. So he could easily turn the Vegas convention into his own personal convention. But why bother to compete with SAAC? I'm sure it is easier to just advertise in the SAAC publications and have a presences at the conventions.
And why go to the trouble of creating his own registry? I'm sure he cannot just expect to copy all of the information out of the SAAC registry into his own. And it would take a long time to collect all of that information all over again independently. And just how much money do you think he would make off of a competing registry? He probably has much bigger plans to make money.
The only problem that I can see with the SAAC registry is that it is a book that gets published every decade or so. If SAAC does not want to take this information online, then they should publish updates to the registry on a regular basis (much like they moved classified to the snakebite bulletins when the magazine started to come out so infrequently). Then they could sell the registry updates as a subscription to registry owners.