I’m using the subscriptions API to add products to the existing contract. I don’t want for those added products to have any influence on the shipping price of the next order though (meaning that the shipping price should be resolved using the rest of the products in the contract). Is it possible? If so, how do I approach it?
I would recommend creating a discount code that provides free shipping to those products. Our billing attempts currently set the cheapest shipping method, and when you add products we try to find the new cheapest shipping method. If you are adding products with a free discount code though, the shipping should remain the same.