I get what you’re saying but the forgetful customer is explicitly what they said they want, which is dumb any way you look at it. Many times you’re forced into signing up for subscription, or coerced under the guise of a free trial. Now this wouldn’t be as bad if they came back and were like, “hey we see you haven’t used our service in a while, do you still need it?” rather than just leeching money from the user. The system is designed to purposely allow the user to make these errors and that’s wrong any way you want to shape it.