I have been linking my individual products to unique Mailchimp lists (using the Product Notification URL in each specific product). When this data hits Mailchimp, it then then triggers automated emails based on the product a person has purchased.
My lists are growing and I don't have visibility over whether a customer has purchased Product A and B, because they are on two separate lists.
Mailchimp have recommended that I create one Master List, which everyone goes onto, and then populate Sub Groups based on the products they buy. So, Sub Group 1 = Product A, Sub Group 2 = Product B, etc. But they can't advise if the integration between ejunkie and Mailchimp will notify Mailchimp of the correct sub group a person's data needs to go into.
Any advice on this would be much appreciated.