Un-subscription vs Subscription
Something I've realised recently is that a way out of a proposition is as important as the way in. More time needs to be spent designing the un-subscription process. The motive of making things as hard as possible to leave, is something that needs to be left behind.
My friend recently mentioned that he'd signed up to the premium service from Spotify. He wasn't concerned about the £10/month subscription or the number of devices he could activate - he just wanted to know that it was easy to leave.
It reminded me of my previous car insurance provider, their renewal email contained a link that if confirmed, would cancel your car insurance. Simple for me to grasp and action.
Easy cancellation is a positive to be included in feature lists.