Thank You for this.
Unless it is Amazon I mostly just hop from service to service as the freebies come up. I have managed to get Amazon to let me keep my educational half off Prime discount well behind the 4 year cutoff, being in education has it perks.

. I chain the Kindle Unlimited yearly subscription discounts so I have never paid full price for that. When Amazon's music service started up I jumped on their offer of letting me subscribe for what I was paying Spotify with a 30 percent discount if I payed for two years. Since I was in Spotify's half off educational discount plan I managed to get Amazon music for about 10 dollars less for two years then they now charge for one year. Thanks to the users here I got 102 audiobooks for just over $175 last year. Being frugal is a sport for me.