Yep :) I just find example.com easier to remember and quicker to type than any of the OS or browser makers own URLs like

- http://captive.apple.com/

- http://connectivitycheck.gstatic.com/generate_204

- http://detectportal.brave-http-only.com/

Plus, it feels nice to depend on the reserved domain name example.com instead of relying on a domain that any one specific corporation has to maintain :D