In the video game industry, it's generally accepted that 5% of customers are responsible for 85% of the money spent on buying games every year. With eBooks, a large number of those 5% hang out at MR, and are the ones that a lot of less tech-savvy customers rely on for help and advice when they decide what eReader to buy and where to buy their eBooks.
Just something to keep in mind before dismissing the opinions in this thread as coming from an insignificant minority that doesn't matter.