Subscription Customers are tagged in Shopify as "Manage Comics - Active"

Find all Active Subscribers

To search for subscription customers, in Shopify go to Customers, click on Tagged With, then enter customer_tags CONTAINS and select "Manage Comics - Active".

Create an email list for subscribers only

1 - Save the segment.

2 - Name the segment.

Note: You can only send emails to customers who are "Opted In" to email.