Here’s a list of registered players, if anyone wants to know:
I can’t help but notice that Ed Haponik is registered, but not signed up for any specific divisions. 
What?
It costs $15 for one day or $45 for the full 4-days.
You can buy tickets here: Buy Tickets « 2016 World YoYo Contest (it’s alright for me to post this right?)
There website is a little bit confusing with all the tabs and pages, but it’s not really their fault. They are just making sure everything is covered and done right.