[Still Thinking]

I would think that by changing the rules at the last minute that the organizer would be at risk for lawsuits to force them to refund everything.

And not just the space rent. They entered a contract with the exhibitors which had the potential to be profitable for those vendors, otherwise they vendors wouldn't have bought in the first place. Just refunding the fee is no more than status quo ante. It doesn't cover the damage actually suffered by those they screwed with this decision.

[FreedomPoster]

Excellent point.