While I have seen attendance grow a bit and then fall back a bit, it is a far cry from 90,000. From their website they appear to have backed off of the "by invitation only" to a limit of 5,000 tickets. To be honest, I was going to guesstimate that they get 1,000 - 2,000 folks. 5,000 seems like a lofty ceiling to me, but maybe I'm a poor judge of crowd sizes. Or, maybe a lot has changed since I was there last (1998).
It is a competition, though, that some people take more seriously than others...