The treadmill that runs away from you also to me showed a weakness of the approach; I think it's pretty obvious that the treadmill that chases you is more obviously funny. You get to touch on ominous, push more psychological buttons, and still have the fundamental hardware humor of a treadmill designed to move rather than just be still. I think any serious humor writer would make that change.

On the other hand, this does open up some interesting spaces no human would normally explore, for that sort of reason. https://www.garlicgpt.com/post/shopify-ceo-quits-after-losin... is just... not quite right... and almost funny just for that. At least to me. But that's probably not a very reliable measure of humor. A human humorist could probably riff off of the ideas in that that fairly effectively. But as written, it just never quite lands.