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Wendy's Restaurant - Buy a Keychain for 99 Cents, Get a Free Jr. Frosty For A Year (YMMV)
Check with your local Wendy's to see if they are participating but when you buy a keychain for only 99 cents, you can get a free jr. frosty with no other purchase required for a whole year!
You just show the cashier your keychain.
So far this has been confirmed in Chicago, No. California and a few other places.
If you find it is valid in your city/state please comment so everyone can know where this deal can be found.