Problem is, generation XYZ or whichever we are in nowadays, just doesn't really give a damn.
This kid might have, and the store might have benefitted, and the customers might have benefitted, but 99% of other kids/store owners don't.
I stopped shopping at one of my "local" shops recently when I went in and the people there didn't even really care. They sucked all of the happiness I had had as I walked into the store, and left me with apathy, plus I was personally stalked around the store by a "bouncer", despite shopping there for > 1.5 years.
Fact is, 99% of people will go for the absolute cheapest product/brand/anything and damn anything else, they don't care when they get to the checkout, they look at you with contempt for being in such a "low" social status. What is really inspiring about this kid is that he rose above it, and showed that he was more than just a bagger.
As the number of people in a community gets larger, the community itself breaks apart and people stop caring about each other. Simple fact.