Where they get people with autopay, is people who don't track their expenses much if barely at all.
You probably won't notice a different in your accounts from when your promo rate of $50/month jumps up to $85/month, because the promo expired and now you're paying full price.
At least with TV, it's trending (probably more quickly than the industry predicted) to 100% hardware-less, interenet-delivered subscriptions. YouTubeTV, Hulu Live, Sling, etc. style services I guess will be the majority in, maybe 10 years from now? A "cable box" or "satellite box" underneath your TV, will be a thing of the past for most people. If you have even a decent internet connection, and a smart TV (or a smart dongle connected via HDMI), then you automatically have access to several "cable" providers that you can switch on the fly, with no cancellation fees.