Netflix made a lot of money off me in the early 2000s, the pre-streaming days (and MacOS X, and 10.1 days), when discs were sent out by mail. One could go queue up everything you wanted to watch, have a couple discs out at a time, and get new ones sent to you as watched discs were returned. There was never enough time in the day to watch them, with unwatched discs in my possession for weeks, turning into months. Yet the idea of the all-you-can-eat buffet monthly subscription kept me hooked, kept me paying. The other hook was that you had a curated list of stuff to watch, and the queue would manage itself, as fast as one could watch them.

It's possible I could've saved money just renting 1 movie at a time, no different from how online rentals are now.

I think disc rentals over mail and Redbox machines still has some relevance even today. You never have to worry if a movie's taken off the streaming catalog, then having to research what other streamer has it, then contemplating if you want to go through signing-up just for 1 movie. You found the movie, you requested it, and it's getting mailed to you in hardcopy. It won't suddenly disappear in transit due to rights-holder issues.

But you couldn't watch 8 hours of movies and shows in a single sitting.