I guess also there is a second question, which I think I know the answer to. Is it possible to change the zap split based on the client the sale is made in? For example if I make a sale on your site, you get 5%, but if it happens on amethyst, you get 1% and they get 4%?

I haven't dug into the spec yet so I'm unsure if the zap split is coupled to the listing or not.