The trend so far has been in the opposite direction. Amazon Prime moved from annual to monthly subscriptions about a year ago. I usually subscribe for Prime Day or Black Friday (when regular shipping is slowest) and catch up on new programming at the same time. I stagger Netflix with that. We have a full time Crave subscription through a BDU but I'm starting to wonder why. HBO's programming has fallen in both quantity and quality and Starz programming has been siphoned off to an extra cost item. At one time I just subscribed to TMN(Crave) when they had a promo for new subscribers and cancelled when the promo was up. It might be time to go back to that.
There are tons of programs now available with all on different platforms with many options and number of productions the quality i feel starts to deteriorate and very few offering true entertainment. As for now subscribe, cancel, repeat is the pattern