I don't want to argue or convince anyone to tip when they do not want to because it is just a personal choice. But tipping sometimes pays off with unexpected benefits if you go to a dispensary frequently or get deliveries on the regular.

For instance, the walgreens person can't shake the containers and tell me if one bottle feels like a big nug instead of shake or hold an order a extra day. Now it is true, they would probably do that if I asked anyway because I always ask if they do it for their own orders. But when I see the same people over and over and they are young and I have extra money I tip. I worked for tips when I was young so I like to tip if I can for good service even if not required. :)