This donation is for the NTP Foundation for something specific like their website.

The big companies who use NTP have their own pools and either use versions of different ntp implantations or their own internal ones.

All of these comments assuming cloud providers are using the reference NTP implementation and the public pools have no idea what they’re talking about.

Perhaps it is just my career experience, but I have never worked at a company that 1) cared about the time and 2) did not have its own clocks and 3) would touch ntpd with a 10-foot pole.