This is a  Plus Add On.

Plus Add Ons are included in all Plus or higher premium membership plans.

How it Works

• Admin designates a post as an “addon package” by setting a price for access and selecting which membership levels can purchase the package.
• For users without access, the page will show the excerpt and a link to purchase at the bottom of the page.
• For users with access, the page will display the full post content (content after the “more” tag).
• Set the global PMPROAP_EXP_DAYS to optionally define an expiration term for access to Addon Packages.
• Use the filter pmproap_all_access_levels to define the level(s) that have “all access” as demonstrated in this companion tutorial.
• Addon Packages only works for a one-time charge (no recurring payments on a single content purchase). You also cannot currently apply tax or discount codes to the addon package purchase.