I was one in the 90s as a young teen and it was pure child exploitation. I got paid 10 cents per paper and was worked to the bone because I was delivering to condos, which required labeling each paper beforehand and getting off my bike to go into every lobby.
Bitter old people with nothing better to do than abuse a kid would literally wait for me to enter the lobby to yell at me if I ever arrived at a different time than they were used to still within the allotted multi-hour window. They would routinely lie and lodge complaints against a 13 year old kid with a flat tire on his bike who was 20 mins “late” because he had to walk that day or help his sister with homework after school. Good riddance to that industry and those horrible people.