Free vs. Paid
Free can give a business the openness of mind that it needs to get to the next level. Paid can limit the evolution of that thinking. One cannot but wonder how far can some companies go if they would think about the value of their service on a different way. Look at Mint for example. A company that took an established personal finance model and made it free and reinvented the revenue stream. It sold to Intuit for $170 Million.