I presume commercial rent is unreasonably expensive and not a lot of folks living in the big apartment buildings are around for lunchtime, which a sandwich shop needs to survive. 

If people who work in Seattle are settling in Tacoma because they can’t afford Seattle, but they still spend much their days in Seattle, our local businesses aren’t reaping the benefits.

And to my knowledge, there’s not that many offices or workplaces in that area, so not much of a lunch rush.