Have you seen these annoying ads for Jamster.com? Well, I finally decided to check it out. Upon finding the terms and conditions, I found this piece. Check out the last sentence.
"To unsubscribe, text "STOP" to 88888 or go to "My Clubs" under "My Jamster!" on www.jamster.co.uk or send an Email to billing@jamster.co.uk. The termination shall become effective immediately upon termination."
Wow. Clear as mud. Gotta love it.