"Making Springfielders eat at restraunt" Xmas edition trick?

jankrohn wrote:
If that works, that's going to be the ultimate gift card generating machinery.

I think there's even space for more optimization: Send either Homer or Lisa to the tree house, and let the other character continue on their regular gift card tasks (until you either tap the tree house by mistake, leaving you a second round, or gathered all premium items from the surprise wheel).