… to get free money!
You should already know that if you throw your jar of change into a Coinstar machine, there’s no fee if you take your output as a gift certificate. And there’s lots of stores from which to choose, though of course you know I go for the Amazon certificate every time.
And now through mid-December, why not make a little extra on the deal? Change at least $40, and you’ll get an extra $10 (as long as you’re getting a certificate back, not cash). Not a bad deal on money you found in your couch cushions, right?