They even literally have a section of the article that says they "see Fair Software as an alternative model to the free and open source software model", and they think it's superior because the "developers can profit".
Newsflash: the developers usually see fractions of those cents while most of the money goes to the management and shareholders of the company that employs them. Hmm, doesn't seem fair to me.
Also, developers can and do profit from FOSS in many ways, but the most popular models are with commercial support, SaaS offerings, and additional functionality (like providing a web interface, clustering manager or other external piece of the puzzle to solve the problem at scale in enterprise).
Like you said so succinctly: propaganda website to make rug pullers like Elastic and Hashicorp look better.