Free YoPlus Sample

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Sign up for Betty Crocker email newsletter and get a coupon for a free sample of YoPlus yogurt.  I’m a little confused as to why they are calling it a sample.  If you are getting a coupon it has to be for a free full size product.  Don’t you think?!?  Am I missing something?  Either way, it’s free.
Note:  This offer is not valid in the following states:  CA, ID, LA, MN, NJ, NV, ND and TN {{sad face for me}}