I want to pay for NEW customers only on Meta. No matter what we do (including excluding the entire existing customer list), the number of new customers noted on Shopify do not in any way, shape or form, map to Meta. Appreciate attribution models are ...

Hey guys!I need some help with this PerformanceMax campaign which is using standard Google channel feed from Shopify (planning to move it to datafeedwatch but that's a separate issue). The pmax campaign has been at basically 0 ROAS for all of march a...