But that isn't their model. Their model is to let the seller set up "reward tiers", and usually the tier that corresponds with "get the final product early!" co

But that isn't their model. Their model is to let the seller set up "reward tiers", and usually the tier that corresponds with "get the final product early!" comes at a bit of a discount off the "final retail price". But even in your case, it's extremely flawed, how can you know the final retail price before they set a final retail price?