After reading Derek's awesome replies in this thread, I decided to go ahead and ask a question that has often popped into my mind: Is there data on the percentage of Gen-Con attendees who buy tickets to events? I have gotten into a few...probably not arguments, per se, but interesting discussions about whether people like me who go exclusively to engage in non-ticketed events (Auction, Exhibition Hall, casual cosplay, general socializing, et cetera) are such a tiny minority as to be outlying aberrations, or whether there is a significant number of us.
From the sheer number of events and players in said events, it seems on one hand to be obvious that most people buy lots of tickets, but there are also lots of people who do wall-to-wall events the entire convention, which might be skewing the numbers.
Obviously there may be reasons I may or may not understand as to why this data could either be unavailable or not something you would want to discuss, and obviously that is fine. But I figured I might as well ask!