Agreed. The current format of this competition feels disconnected from the spirit of the original event.
One could reshape it similar to this:
1)Order pizza and pay with
BTC anytime during
the year*.2)Share proof of your purchases during "Bitcoin Pizza Day on Bitcointalk" by placing relevant receipts and photos.
3)
Users who’ve bought the most pizzas with BTCand eaten them 
become the winners.
*) Subject to discuss.
While I like the idea of using, I.e. spending, Bitcoin in a pizza day contest, I am afraid this would cut out people with less bitcoins, and also would have not trivial implications in terms of privacy.
Probably a no go for me.
Does that mean we should eat pizza all year round? There's no way I'm gaining weight for a contest

Also, a sensible point. As I wasn’t constantly menaced by my scale, last thing I need is an excuse to indulge in dough and mozzarella.