I agree with Gary that it shouldn't need to promote GBO, though I also agree that I don't have a problem promoting GBO, since I spend a lot of time here, and have found it one of the most rewarding forums I visit. Anyone wishing to enter a design should design it as they choose (with or without reference to GBO), and should only change their design to add or adjust any part of it if they personally are ok with the changes anyone else might suggest.
If the final chosen design (should there be one) is acceptable to the expert wax maker, and he so chooses to make the positive and the molds, than he should be compensated out of the cost for his time and materials.
Ultimately, there will be a few people that will be critical components of this project's success - and they must all agree to it as it plays out, or it will fail - board mods/admins, wax/mold maker, and caster. The caster usually doesn't care about the design too much, but having the board leadership and the mold maker agree on the design is essential.