Denver Post allows you to subscribe online but they do not allow you to cancel online. You have to call them. It’s a dark pattern and an asshole move.
From https://www.denverpost.com/all-access-faq/
Q: What is your cancellation and refund policy?
You may cancel or modify your subscription at any time by calling Member Services at 303-832-3232.
I’ve never noticed that before. That’s odd. Have you asked them why?
I was in the process of subscribing and decided to check before hitting submit. A lot of newspapers uses this dark pattern and I have gotten annoyed by it in the past. I checked their FAQ and saw that. I confirmed via online chat that you had to call to cancel.