Call me sloppy, but I have been charged every month since Nov 2007 for a subscription site that I've never seen until today. The only way I discovered it was by looking through my statements and trying to understand who was charging me for something each month. I had to Google the name to get a clue.
Have you ever done this?
I suppose I signed up for a trial at one time or downloaded something that had a subscription attached. I really don't remember.