Earlier quoted context omitted.
> What is the opportunity for developers? An opportunity to make unsubscribing a more engaging activity
It's the opportunity to take more of your revenue as margin, plain and simple. Contrary to your suggestion, I would argue that most businesses do not want to predatorily extract money from unwilling customers. It's typically the old, calcified businesses that do not innovate (gyms, cable companies, etc.) that engage in this behavior. I want more margin so I can hire more engineers and change the world faster. Google…
They'd all rather receive the money from happy customers enthusiastically paying because they love the service so much, but if the third option is no money they all know what their second choice would be.