The term “dark pattern” refers to any deceptive practice, no matter how small or insignificant it may seem, that online websites, apps, etc use to get people to do the site/app’s desired behavior, such as in this case, not cancel their Prime subscription. Not all of these examples may apply in Amazon’s case, but some examples would be making the fields or buttons for canceling or keeping your subscriptions different colors or sizes, making the default choice to keep the subscription, making you view a bunch of ads to keep the sub or go through a bunch of other pages before canceling, or hiding the cancelation option in fine print in a corner of the site. The “dark” part means that the average person usually doesn’t notice the deceptive nature of the practices.