I am not a fan of high compensation overall on the C-Level. What I'm worried about most with these types of companies is being destroyed from within. That's generally heralded by bringing in high cost outside consultancy firms.
I don't see that yet on their balance sheet. No idea what Mozilla Corp. does, but the Mozilla Foundation is still doing things I am aligned with.
But as with all things, constant vigilence is key. More and more it feels like there's barely anywhere left to invest time or money in. Fediverse is truly a ray of sunshine at the moment. But I wonder how long that'll last until it's been subverted by commercial interests.