Brian Chesky is not merely the CEO of AirBnB, he is also the cofounder with a networth of 4.1 billion dollars.
It is one thing for a literal billionaire, who owns the company to undergo 'hardship' in order to save the company they built over the past 10+ years.
It is a whole other thing for a mere employee to sacrifice their salary during a company downturn. To do so is an act of pure charity---which while it may be inline with ethos of a non-profit worker, isn't something that we as total 3rd parties should expect.
Mitchell Baker is just an "employee", despite her long years of service. She was even fired from Netscape during a round of layoffs, and served as a mere volunteer for years.