There have been a few times where I didn't sign up for a service because I anticipated cancelling would be a pain. The fact that trials often autorenew makes me reluctant to even do a trial. I wonder how much business is lost this way vs. how much is gained from making cancelling hard.
Cable TV is a classic example. If you ask how much it'll cost after the promotion ends, they'll go on repeat, "It'll be $20 for the first three months".
