typu, the 'basics' to run a convention center con include:
people, money, and motivation/effort/support.
After Wondercon, they had none of these things. So at that point, many of us began to assume it would not happen. Of course there was no certainty, miracles have happened before. But it was the likely result.
I understand why they lost support, but it's really all post-mortem now. Sometimes what might originally seem like a minor action toward a single person quickly can quickly become a major issue to the community. You use the term "Radio Silence", but silence is not a planned action. It is the natural result of no one being there.
Like the in famous poem: "This is the way the world ends: Not with a bang but a whimper."
Because when the world ends, there is no one left to plan for it, or announce it.
(or the trance version) http://www.youtube.com/watch?v=ghgmMUy-E_k