Comment by TheDong

To quote from the page:

> Do not use the standard pool.ntp.org names as a default configuration in your system

Apple's default is time.apple.com, ubuntu has their own pool, android as well, same for windows.

All the big linux distros also run their own ntp servers.

The ntppool.org stats show about 100k queries per second https://status.ntppool.org/

100k/s is consistent with on the order of lower 10s of millions of devices, with most checking every 10 or so minutes, and a few misconfigured ones hammering the server at a high frequency.

It certainly isn't billions of devices.