Quoting Brian E. Lavender (brian@brie.com):

I feel like I am definitely behind the times! Now I see the "Server Side Public License"

https://www.mongodb.com/licensing/server-side-public-license

Not open source because it is discriminatory towards specific fields of use. Thus, it's a "fauxpen source" licence. https://opensource.org/node/1099

(MongoDB, Inc. applied to OSI for "OSI Certified" status, then withdrew it when they saw it was going to be voted down.)

I don't buy MongoDB, Inc.'s claim that Affero GPL's "boundaries are being tested". What they really mean is that they changed Affero GPL section 13 scope to broaden it to require source release of "management software, user interfaces, application program interfaces, automation software, monitoring software, backup software, storage software and hosting software, all such that a user could run an instance of the service using the Service Source Code you make available" as a poison pill against commercial competition. Major distros responded by dropping MongoDB.

Elastic NV has made the same move with Elasticsearch/Kibana for the same reasons. The open source world responded, as with MongoDB, by dropping the package, and also in Elasticsearch/Kibana's case, forking as OpenSearch and OpenSearch Dashboards. https://en.wikipedia.org/wiki/OpenSearch_(software)

Nobody has (yet) forked the last AGPL version of MongoDB to take it back to open source. https://www.reddit.com/r/mongodb/comments/agyalw/looking_for_active_fork_of_...