My member directory allows for users to register and access certain features of the directory. Unfortunately, there is no way for the member subscription levels to be used in a front-facing way outside of their own profile pages.
I suggest adding membership levels to the usermeta table and allow it to be displayed on posts based on who the author is. For instance, a directory listing owned by a member with a "Gold Tier" membership plan could display a "Gold Tier" badge or banner on the page.
This may also help with restricting access to a wider array of features, building filters into post searches/loops, and other membership-related requirements.
10 months ago