Making 'One Laptop Per Child' work

Sell the $100 laptop in open market and use royalty to fund free laptops to poor children: I don't understand why OLPC doesn't want to sell in open markets, and why the manufacturing contract has to be exclusive to specific manufacturer(s). By doing this, OLPC is not unleashing the power of the markets. Such a sound concept as $100 laptop, when complemented by the market, will work exponentially well. I suggest a system where the design is made close to open source, and any manufacturer can use the design, and they can make improvements. However, the manufacturers should agree to submit any design or function improvements to the MediaLabs, in return for the original design. The MediaLabs should collect royalty as a percentage of sales, and use it to fund free or subsidized laptops for children of poor countries.