From what I have read on the site, they are picking 90 BBQ Competitions across all of the major different sactioning bodies, MBN,MIM,KCBS,FBA,NCBA,NEBS,PNWBA etc.
That means this contest doesn't have to be sanctioned by any BBQ organization, they just find out the GC of a contest and invite them.
From those 90 comps the Grand Champions get an invite to Vegas.
WFC Competition Committee then chooses 5 teams from applications
And another 5 are chosen by JustAPinch.com
Total field of 100.
Then the winner faces off against the other category groups at a chefs table the next day to deterimine the World Food Champion.
"We're a drinking team...with a BBQ problem" http://www.toosaucedtopork.com