“To have a right to do a thing is not at all the same as to be right in doing it.” - G. K. Chesterton While reading the news the other day I ran across an article indicating that Starbucks had lost $12 billion from boycotts due to its support for Israel. The veracity of the report has been called into question as it is hard to determine by an outsider for many reasons including that companies are understandably reluctant to admit that boycotts work.
It might expose some people to an opinion they're not familiar with, but the impact is probably minor.
This is marketing. It's telling people what they want to hear so they'll feel good about buying a product.
> I imagine that very few people determine their political position based on the Tweets of their favorite coffee shop.
Not directly, but those tweets do affect the Overton window.