Kudos on the prenom.
I think you answer your own questions when you consider it's the retailers that vote on the nominations. After all, you are more likely to sell a new game if it is a licensed product, and thus it is more likely to be carried and considered more popular. And as neither White Wolf nor Wizards of the Coast had items on the prenom, those companies actually nominated are the ones that have product that retailers are most likely to carry and sell.
Although Ken Hite's excellent The Day After Ragnarok is the exception that proves the rule. <grin>