Also keep in mind, Chrissie, that once you've updated your membership page, that page isn't a landing page they give you on your profile. They expect you to use the link only.
“Referred Membership — a MPP Affiliate Feature, But How Do Your Supporters Find It?”
https://link.medium.com/ujUYvxjCjpb
But there are some DIY ways to create a landing page, pinned to your homepage:
“How To Display Your Own Referred Membership Landing Page”
https://link.medium.com/xAjhTJmCjpb
But the concept could easily be used (which is a clickable embedded image) to add to the bottom of any of your own stories.
--TSA