Community — a members space with tiers

1. Tiers — free, one-time (lifetime) or recurring. Each tier says what it unlocks: spaces, courses, downloads, booking discounts.
2. Spaces — discussion areas; members post, reply, react. You and moderators pin, lock and remove.
3. Members — who is in which tier, since when, and their activity. Add someone by hand; export.
4. Billing — paid tiers charge through your gateway; renewals are automatic for recurring tiers; lapsed members lose access when their period ends.

Members use /community on your domain with their own login (the same login works for courses and bookings).