Brand loyalists are your regular customers. They have made many purchases, have a medium lifetime value (LTV) and have purchased recently in the past 4 months.
This automation will add users to the segment when they meet your store criteria for a brand loyalist or have them lapse when they haven’t purchased recently.
This automation is part of an ecommerce strategy for dynamic segmentation. You'll need to set up all my recommended ecommerce segment automations and supporting automations as defined in my blog article Hacking ActiveCampaign to Build Dynamic Ecommerce Segments Using Infinite Loops.