A valid point. But it also depends on how the manufacturer operates their marketing program. Here is part of the comment from the website:
NetBate - Making Your Promotions Known Instantly!
CNET Media Services? NetBate is the vehicle for manufacturers to instantly distribute turnkey promotions ? such as coupons, rebates, and services ? to consumers over the Internet. Never before have manufacturers been equipped with a powerful, cost effective tool that enables immediate implementation of national promotions.
We place your NetBate promotion directly next to your product listings on multiple pages within CNET.com, reaching almost 10 million tech buyers each month. CNET compares more than one million prices for more than 250,000 products, making it one of the most up-to-date and efficient shopping resources on the web. Since 1995, our award-winning Web sites and television series have become the definitive source for information about computers, the Internet, and digital technologies.
This suggests that TDK solicited this posting to achieve the obvious benefits.