I ain't no OSI shill. No, rather I mean it's "your employer probably doesn't want you to even look at this" source-available. Many people here work on SaaS products. If you work on a SaaS you likely want to avoid AGPL/OSL/SSPL without consulting your legal team.

As a corollary, the Unreal engine source is on GitHub, but that doesn't make it open source.

It's strictly disingenuous to call SSPL open source (I personally believe it's disingenuous to call AGPL open source but I digress)