This change doesn’t even have anything to do with customers as far as I can tell? Sounds like they pissed off their resellers by cutting them out of deals with their biggest accounts, and are regretting burning all those bridges.

In case you are unaware, make sure to override DNS on any web browsers or other programs that might be skipping OS configured DNS servers to use hard-coded DNS over HTTPS servers.

If you’re running your own DNS resolver you can hint this to some applications in your network via a canary domain