Nobody cares, everybody just wants to monetize, while not even knowing which of those requests result in revenue. Just load everything and see what happens!
Regarding: "Also I never realized it was SO BAD without adblock". That's part of the problem. We techies have no idea what's happening without an ad blocker because we all use one. This service wants to show the unseen.
This was an old result from when the server didn't have enough memory for big sites (especially the version without uBO). I reran it for Reddit, you can see the result on the same URL.
In what way do you think news sites would pay for this service? They want full throttle ads everywhere right, not sure why this service is of any use. They just think: the more header bidding partners putting cookies everywhere the more money