On the flip side, FB could put up a billboard talking about how they built and open-sourced projects like React and GraphQL.
Or they could put up billboards talking about how Llama is "Open Source" while at the same requiring projects to display "Built with Llama" prominently if they use a Llama model (guess how many companies follow this requirement?).
Or, how they tried a BSD+Patents approach with React initially, until they finally changed it after much backslash?
Facebook/Meta has seemingly a long history of wanting to claim they do a lot of FOSS, yet clearly mislead people about those efforts.
To say nothing of the fact that Microsoft owns Github and NPM. An entire class of modern applications, for better or worse, came out of Github's Electron.