A few years ago, I sent a message to Stripe about a problem with its documentation (they let you switch examples to be in different languages, but at least some

A few years ago, I sent a message to Stripe about a problem with its documentation (they let you switch examples to be in different languages, but at least some Java examples showed up as C++). They not only sent a personal message saying they fixed it, but also offered me a free tshirt. It really sent a message that they cared about documentation.