I am setting up my first WSO, and I'm including an upsell which complements the initial product, but it is not needed to make the WSO work.
But I'm not sure how best to set it up.
Once someone orders the wso, do I send them to a payment page, and then add the upsell offer between the payment and download page? Or do I send them to an upsell page before they pay?
Any advice from experienced WSOers appreciated!