Those nice displays, printing the sketchbooks, the drawing materials, the paper, shipping items to the convention, all of those cost money regardless of travel expenses being factored into the equation.
Yep, those costs are not fun.
Also with the case of published, working creators, the convention takes time away from the gig that's making them their regular paycheck.
no comment
Basically it's silly to rip on a creator for making money for his time or talent at a convention when there's no way to know how much they might be out of pocket just to be there.
don't have a problem with a creator making money, but a creator charging for a signature is a bit much to me.