AS Twitter rep:
Hi, we're sorry that this was unpleasant for you. The complimentary beverage or chocolate is intended for our guests that are seated in the Main Cabin. Typically, if an elite wasn't upgraded it's our way of Thanking them for being a loyal guest. https://t.co/xBwggsP3Gn -Angel
Me: Main Cabin includes Premium Class, correct?
Main cabin applies to the rest of the seating outside of Premium Class & First Class.
-Angel
They very literally told me that PC is not Main Cabin and that the benefit is in Main Cabin only.
Then, an IRL FA today told me I had to choose, then I chose chocolate, and she still gave me an IPA. So I appreciate the above very detailed theoretical explanation, but I've now had two AS employees tell me differently.