Backgound:
- Avis Preferred.
- Rented using my corporate rate that I am eligible for (it is a really big US company that everyone will know so not some obscure AWD code)
- Made 1 day rental
- Prior to trip realized I needed 2 days but they were sold out.
- I didn't want to muck with my reservation and rate prior to pick up.
- I am Avis Preferred and used Select and Go option.
- Line at regular desk was really long so I didn't go to the counter prior to starting my rental (was that my mistake)?

During the rental since I needed to extend 1 more day and app was charging me $12 for changing the return date on top of the daily rate plus taxes. I called Customer Service and they told me they would charge me even more if I didn't change it prior to the 1 day ending and extending it; i.e. would be charged as a "no return." Didn't want to have rental towed on me like the guy in NJ on Twitter last month so I went ahead and paid.

I don't ever recall having to deal with this in the past. Is this a new practice or I just got lucky for the last few decades?