From James Altucher:
People don’t value what they get for free. I’ve seen this in every business I’ve ever run. I’ve seen this in every service I ever provided… How do they kill you? They always expect good work for free. They set the bar higher and higher. And they feel comfortable dictating what free things they should get from you…
It’s not because it’s about money. It’s because I’ve seen it directly: people treat you worse when you give something for free. And they treat you better when they feel like they have given something for the value they received.
James is remarkably entertaining and thought-provoking. The whole article is worth reading.