I shall term this Cooperative Software.
1. Always source-available.
2. Shared code ownership through an entity, or through https://xlcollaborative.com/
3. Users pay for Membership, which lets them use the software and file issues.
4. Maintainer time is *paid* by users.
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.