The Paid Memberships Pro add-on library extends the core plugin with focused features: Approvals adds an approval queue, Sponsored Members links sub-accounts to a sponsor, Multiple Memberships per User lets a single user hold concurrent levels, Register Helper introduces custom registration fields, and the various reports add-ons emit cached aggregates. Each add-on writes to either its own table or wp_usermeta with add-on-prefixed keys.

The default admin shows each add-on as its own screen or tab. The approval queue is its own screen. Sponsored relationships have their own column on the members view but not their own cohort view. Multiple memberships per user are visible per-user but not as a roster. Cross-add-on questions (show me approved members on more than one level with completed sponsor relationships) need either custom SQL or piecemeal exports.

SleekView reads each add-on table or meta key as a standard data source and joins them to wp_pmpro_memberships_users on user_id. The approval queue becomes a filter, the sponsored-relationships graph becomes a joined column, and Register Helper fields become first-class columns alongside the core PMPro data.

PMPro stays lean by keeping its core small and offloading features to add-ons. That is the right architectural choice, but it means operational data ends up spread across the core members and orders tables plus each enabled add-on's tables or wp_usermeta keys. The default admin reflects that split: Approvals, Sponsored Members, Multiple Memberships, and Register Helper each have their own screen or column, but no single screen consolidates them.

A real ops question (approved members on the Pro level with completed sponsor relationships and recent failed payments) needs cross-add-on data. SleekView reads each add-on as a standard data source and joins them to the core roster on user_id. The approval queue becomes a filter, the sponsor roll-up becomes a saved view, and Register Helper fields become first-class columns.

Admins, finance, and support each get the slice they actually need.