I don't know how many people are behind this, but I think they implement the consent frameworks manually, so if it doesn't work you can report the website in the extension and help other people in the future with your contribution!
Yes there is competition for streaming but not for the specific content of the services. With music I can choose Spotify or Deezer or whatever, but for Disney content I can only use Disney+ or for Paramount Content only Paramount+, so they have a monopoly for their respective content if I want to stream it.
Physically I agree with you, but psychologically it is much easier to control what I eat when I regularly go to the gym because when I work out and eat too much it feels like I am wasting my time there. So even if I only burn 300 kcal, I feel like I am taking care of my body and pay more attention to what I eat over the day.
Thanks for the tip, I didn't know that.