So I’m using MC4WP plugin, which collects data from WooCommerce orders. Therefore, customer is added to the audience. But as I said, is NOT flagged as Subscriber. I tag him: customer.
But when customer wants to join newsletter afterwards, the records tag is updated only (e.g. Hustle or only subscriber, whatever) but still without an actual subscription status in Mailchimp.
There is no problem in opposite scenario, when person signs up for a newsletter first, its subscription is vaild, and when making purchase afterwards, the MC4WP updates the tag only having both customer and Hustle tag.