Many Shopify loyalty program apps make it easy to add members based on their Shopify customer tags. Since Simplee Memberships automatically tags active members, this becomes a simple way to reward your members even more.
Depending on the app you choose, you will likely need to create a new rule or loyalty tier in that app to automatically add customers with a specific tag to a loyalty group.
Here are some popular loyalty point apps which are compatible with customer tags:
App Store Link: https://apps.shopify.com/smile-io
App Store Link: https://apps.shopify.com/loyaltylion