Just got off the DEN -ATL flight and didn't get the comp pre-packaged snack even though I purchased my CP ticket on 5/3. Asked the FA why and she said CP tix purchased after 5/20 don't get it. I didn't have my confirmation showing 5/3 to prove date of purchase and didn't want to put up a stink over a $3 bag of gummi bears but heads up to all who purchased before the cutoff.