Just last week I noticed a charge on my credit cars from Yahoo Ad Free mail. There was an online link to cancel but no apparent way to request a refund.
I have no idea how I ended up getting signed up for this. I've long used Yahoo as pretty much a spam bucket when I have to give out an address to someone I don't care to get emails from. (For all I know, I somehow got signed up a while back but I certainly am not aware of doing it and it's not something I would normally have any reason to do.)