Brian Carter, a guy I admire immensely, raised an interesting question on Twitter today. He asked:

My own answer was, “It’s a moot point. If I like something enough to endorse it, I’d do it anyway for free. I wouldn’t sell my trust away.” Yet even as I said that, I wondered if I was looking at Brian’s question properly. Is an endorsement any different from a recommendation, or sponsorship?
Looking at the answers that Brian received, there was a definite mixed [...]