I can only speak about the 11 years I was on the IBM Convention Committee. I do not know what the current thinking is... following the crude and nasty takeover by Klosterman and his pals... argh.
Anway. Bill Wells was the site chairman and he discovered that the Major Hotels would give us a far better price for rooms over the Fourth of July (it is a dead week for travellers)... so the IBM "established" the fourth weekend and also tried to have the cities that had things for the wives and kids to do while the magicians were watching each other do double lifts!
Many times when the SAM and IBM conventions did not overlap I wanted to split the costs with the SAM to bring over from Europe and the Orient, expensive acts... acts that one group couldn't afford, but if we split the travel we could get them.
We found that the number of people that did both conventions was under ten percent... so if we had, say Fred Kaps at both conventions, only about ten percent would overlap, but who wouldn't want to see someone like Kaps twice?
So, this last one, where it was the SAM's 100th I would bet that if OUR COMMITTEE was in and the SAM folks had talked with us, early enough, we would have given way.
But, like I say, I cannot speak for the current committee.
I have been asked three times to come back, but as long as the political fools that screwed things up are still alive, I refuse to be involved.
Their total LIES and phoney promises are a travesty to the organization.