The following was said about Apple charging to unlock 802.11n in MacBooks.
Why don't they give it away for free, say with Software Update? Because of the Sarbanes-Oxley Act (which was passed in the wake of the Enron scandal). iLounge quotes an Apple representative: "It's about accounting. Because of the Act, the company believes that if it sells a product, then later adds a feature to that product, it can be held liable for improper accounting if it recognizes revenue from the product at the time of sale, given that it hasn't finished delivering the product at that point."
Why don't they give it away for free, say with Software Update? Because of the Sarbanes-Oxley Act (which was passed in the wake of the Enron scandal). iLounge quotes an Apple representative: "It's about accounting. Because of the Act, the company believes that if it sells a product, then later adds a feature to that product, it can be held liable for improper accounting if it recognizes revenue from the product at the time of sale, given that it hasn't finished delivering the product at that point."