One, he wasn't renting with the intent to have the material returned. He was selling for the distributors and paid royalties. Oh, wait, I said that already. I only related what I have learned from experience. I will not even attempt to sort out your issues. I could only speculate why Netflix has a short/long wait distinction. But again, I'd say it was due to the demand and wait time to produce a new disc through their limited number of machines.
One failure mode I have encountered with DVDs is a matter called 'greying' of the disc. The laser used to impart oughts and naughts wears out over time. And for a limited time they will only etch tiny values of 0s & 1s. One hit by a reading red or blue laser will erase the data for many points on that disc. The line has to be shut down and a new laser printer/etcher installed. Having failed discs out in the public and making us aware of the downside to disc storage may be why they want them back, too. You read the data too often and the disc goes blankety bloop. So send them back, please. We woill recycle the plastic into new discs. Thank you. Netflix. Only a guess so don't blame the trouble on me.
Offering a general apology was a nice thing and even though I get the same product at the same price buying used on smszon, rather than Netflox, I'm sure some Netfilch customers are grateful/
If you aren't seeing Heaven while you dream, you're doing something wrong.
Dreams allow escape from the passage of Time.
The ultimate activity is the Dream.