Yes, except Shopify is very intentional about us vs them narratives like this. The CEO is an avid consumer of Video games / SciFi / Nerd culture, and the leadership finds ways to inject these themes into the mission statements.

Curious if your experience of this is good or bad?

Setting up a clear us vs. them mission at least makes it clear across the company what you should be focussing on.

My experience at bigcos is that the mission is some hand wavey 'we exist to make life better for our customers' statement, and no one ever could agree on what that meant.

Neither good or bad to me. Mission is important some people, I have been in the industry long enough to realize companies will change their mission if the business is no longer viable / profitable, so I have taught myself to be indifferent to it. As long as I am working with smart and easy to work with people, on a business that is legal / ethical, I’m good.