Actually, I think it does. Their revenue model is "get people to voluntarily donate". So, that means they have to make a product that is easy to use (low barrier to entry for new user), and valuable to the user (so after using it for the 10th, 100th, 1000th time, you eventually think, "I should give them some $ every month). Like public radio, they have a business model that does not involve ads or fees. But it definitely drives what they do and how they do it.