I'm sorry, I simply don't understand what you're getting at here. I'm not trying to be awkward, I just don't understand it.
If a product is available on DDB, then each time a copy is sold on DDB, WotC would get a cut of that specific sale. They wouldn't get a cut off a copy sold at a convention or your own website or via Kickstarter.
Are you saying you think if I make $50K on Kickstarter, and then put that product on another platform, those platforms should all get a cut of the $50K? I'm sure I'm misunderstanding you!