Previously with the Trick or Treat boxes it was determined that you could get 90% off crafting costs
The new Premium Boxes have a similar crafting boost (20%) to the old Trick or Treat boxes.
I'm wondering if the new box bonus will stack as well.
Alliance boost (max 25%)
50% Crafting on the Cheap
Headless Handyman (from Trick or Treat boxes - 20%)
Crafting Boost (from the new Premium boxes - 20%)
115% off crafting.
While I seriously doubt you'd make fuel by crafting, The new box may reduce crafting costs to zero...