[the_why_of_y]

This is an unlikely scenario. The FSF is a 501(c)(3) charity, which means they have to work for the benefit of the general public and not to give an advantage to any particular person or for-profit company. If they would ever do the latter, the following IRS audit would not be fun.

https://www.irs.gov/Charities-&-Non-Profits/Charitable-Organ...

Many proponents of copyright assignment to for-profit corporations have argued that "it's just the same thing as what the FSF does, so it's fine", but their legal nonprofit status makes it a substantial difference.

A better argument against the FSF's copyright assignment practice is that it is bureaucratic overhead for somewhat questionable benefit.

[cyphar]

I've actually discovered since that the FSF's CLA actually explicitly states that you give them your copyright under the condition that they always provide it under a copyleft license. So it looks like I was wrong about that and might even start contributing to GNU projects.