[twic]

The best bit about this is that the authors registered that entire domain purely so the article could have a vaguely official-looking URL.

[PennRobotics]

Going to a wrong URL shows the Github Pages 404. Searching Github:

https://github.com/journal-doi/cough

https://github.com/the-pudding/cough

https://github.com/arp242/goatcounter (bonus material)

[Qub3d]

GoatCounter is great! I use it for metrics on my hobby site (which are visible publicly): https://dotbun.goatcounter.com/