I'm surprised they are so small. They feel like they are everywhere and doing a ton of volume. I always assumed they had 10%+ of global market share of coffee sales.
When we started I thought the same thing, but quickly came back to earth when the data highlighted just how much coffee people drink in other places (think diners, bakeries, cafes, etc.). In fact, McDonalds is the #1 global chain for coffee sales, because if there's one thing that people love more than coffee - it's cheap coffee!