Okay, if a company wishes to give away something without expecting cash in return, yes, I can see that company taking information on the recipient and selling that information. After all, the company has to make book somehow.
If a company wishes to charge for a product, fine by me. Whatever is in the box didn't magically appear in the company's lap, so it's only fair to ask for value.
However, if a company wishes to charge for a product and then not only expect information on the purchaser but a constant, steady, unending stream of information on that purchaser and anyone who enters that purchaser's home, said company can sit on a spike and rotate. Especially if that company lies about the practice, certainly if the company's product is of dubious quality (remember, we live in an age where Microsoft views day one purchasers as unofficial beta testers), and definitely when there will be another product out there with a lower price, less invasive manners (yes, Sony might sell a gamer's purchase information, but that's all Sony'll get), and at least a moderately better advertising campaign.
Mr. Gates, please come and tell your company to stop. I realize that you're busy being obscenely rich elsewhere but this is beyond stupid. It's sad.