How about making more money through products being sold relating to the convention. I would have liked to have bought some stuff, but it was A) limited to those who had an eticket and B) sold out by the time I even read the news.
If you did a Con thinking that you were going to make money (outside of being a direct vendor), you were on crack.
Merchandising is a tricky thing. If you've ever wondered why a stuffed Stitch costs 10 bucks, but a stuffed Murlock costs 15-20 and it's half the size... It's because the production run on the Stitch was significantly larger than the latter. They could increase the production run, but that's dangerous, as having standing stock on anything due to how it gets taxed as a standing asset at the end of the fiscal year can end up costing you more money than you made selling what you did.
Product costs have a stupid number of factors that play into their final costs. When it comes to side gaming merch, often the case is that the profit margin is really minimal to non-existent.
It's why CCG packs are 3.50-5 bucks now, it has short production runs of the product that they think will sell. (Which isn't very much anymore.)
Honestly... I'd have to sit down and look at the CCG. It doesn't have to die and can still be profitable by a margin, but it's going to require a near full reset to accomplish at this point. The original company that bought the rights to make it really jacked it up pretty bad........
Fantasy Flight made an awesome board game, but it's far too complex for most people to play. And again, due to small production runs is WAAAAAAAAAAAAAAAAY out of most people's budgets.
P&P, can still kind of be done. But again, that goes down the path of Hasbro screwing everyone over with the open D20 licence. That's a very very very long post that I really don't want to get into....