We put on MACNA XIX here in Pittsburgh in 2008 - it was a tremendous undertaking to pull off. As I remember, MASNA provided little more than encouragement and some contractual underpinning and I think some advertising grants. We had to take out our own insurance, underwrite all of the risk (show space, room night guarantees, banking, etc. ) and do all of the planning, booking, scheduling, advertising, signage, etc.
It was wildly successful for the club and MASNA and the hobby. While we did profit, the risk was shouldered by us (not MASNA) and mostly in the form of guarantees. That risk was very substantial with upfront cash outlay for deposits, supplies, etc. I will not post financials here, but the costs/risks involved would bulge some eyeballs for sure. Example, to reserve the space and rooms in the hotel we had to guarantee contractually thousands of room nights and we had to do this BEFORE advertising or selling tickets. Chicken and an Egg thing....
Prior MACNA events did not go as well and many after did not. I think at some point MASNA stopped allowing clubs to host and brought the entire show back in-house. (Forgive me if I misspeak, I don't really keep up with MASNA or MACNA).
We were asked to host again 4 or 5 years later and could not come close to making the numbers work the second time around, even with the city giving us $30K to help offset the cost and bring the conference here.
The hobby has changed and so has sales in general. Travel, food and lodging are exponentially more expensive, as is conference space, decorator, drayage, and other costs. This makes putting on a "convention" extremely expensive and high risk.
I would guess that MACNA is gone for good. Two years cancelled and I am not sure that anybody in the industry cares and in-fact would bet many are relieved. They don't have to spend the money to ensure they are seen along side (and not missing) where competitors show up.