[feanaro]

It's true this is how a typical centralized commercial solution would be marketed. However, it's a bit trickier for Matrix since it's an open protocol with a neutral governing foundation and many client implementations.

Although New Vector (the company behind Modular) is currently driving most of the development of Matrix and Riot (the first and reference client), matrix.org itself is supposed to be a neutral network-related site. Notice the remark that it's controlled by the Matrix Foundation at the bottom of the page, and not New Vector.

That said, Riot does have a reference to Modular, but it's buried here: https://about.riot.im/free. I'd personally be fine with it being displayed somewhere more prominently (or at least under a more intuitive section name than "Free!"). I also think it would also be a good idea if the Riot page mentioned Matrix (or the Matrix logo) somewhere above the fold.