If FunPub were smart, they'd be revealing the at-show toys as well, to get the fence-sitters signing up just to secure any popular at-show toys.
We've had years when at-show toys have sold out, or out-sold the boxsets, that could have helped FunPub with attendance numbers or helped sell out boxsets.
They only need the attendee and Custom Class toy to be a secret for the at-show surprise element of the show... as people don't sign up and spend several hundred dollars to be surprised by their toys, they will only spend hundreds of dollars if they know what they are getting.
I'm someone who loves the surprise reveal of toys, but not two-thirds of the toys I'm spending a couple thousand dollars on a trip to get... or for other people back home who only get about 24 hours to decide.