How about the ability to insert a One Click Upsell button on a membersite that is already linked with Infusionsoft, so that all that is needed is that the system pass the contact ID. Apparently now we need to have the ID of a previous order as well as the contact ID or email. If there is a credit card stored in Infusionsoft, all the data can be grabbed from the contact record and purchase completed, if not... the order form would be presented.