Granny Gears?

$200 entry fee for pro class vs. $80 registration in the just for fun class. I always go just for fun and could care less about the cash, but does going into the just for fun class make me a sand-bagger, do I take anything away from others having fun? Would going top 3 overall in that class prove a point about fees and prizes. Gotta go check the mtbr site and see what folks are saying.