I don't actually think the so-called "Commons Clause" is an "existential threat to open source" (https://drewdevault.com/2018/08/22/Commons-clause-will-destroy-open-source.html).   @RedisLabs has made a proprietary fork of Redis, that's all. Nothing more. The open source code that existed before still exists.  Every five years or so, something like this comes along: someone makes a new license involving commercial-use restrictions, and then does a marketing push to associate it with #opensource licenses. But such licenses have nothing to do with #opensource and never go far.