What happens to the fee model when one entity (association) is inclusive and other entity (Club) is exclusive and the product is sold at either level? The processing fee model is determined by the level the form is entered into by the user.
Therefore if a user enters a form at Association level and has to select their Club the Association fee applies. Eg. in the example above, the inclusive model would apply to both products.
If on the other hand the Club promotes their link and a user enters through a Club form (didn't have to select their club) then the exclusive fee would apply to both the Club and Association product.