Cold Stone Creamery has put out a nice coupon for buy 1, get 1 free on any Love it (medium) size signature creation in a cup.
Pictured above is the Dirt & Worms signature creation which is only available until Halloween.
The Fine Print
Serviced with up to 4 mix-ins. Waffle products & extra mix-ins available for an additional charge. Limit one coupon per guest per visit. Valid only at participating locations in Canada. Not valid with any other offers. Offer expires November 1st, 2012.