Kathy Sierra wrote a brilliant post about loyalty called Your customer won’t take a bullet for you. She makes the point that to understand loyalty, we have to realize that we aren’t loyal to products, we’re loyal to ourselves:

If you want to benefit from a customer’s loyalty to himself, you can’t bribe it, you must earn it. Deserve it. Focus not on upgrading your product but upgrading your user’s capabilities. If you can’t enhance your product, enhance the context in which your product is used. Provide better and more inspiring documentation. Make YouTube tutorials. Join forums and offer expert help where it’s most needed. Use every nanosecond of your social media time to help people become better at something for themselves. Relentlessly ask, “How are we helping our users kick ass? What can we inspire, amplify, teach, enable, empower?”

This reminds me of Tom Fishburne’s “loyalty fatigue” cartoon: