In addition to the point about site visits, there is also a point related to Google's PageRank:
Since 1999 IPWatchdog.com has provided individuals, small businesses and entrepreneurs with information to help them understand all areas of intellectual property and to become better consumers. In fact, IPWatchdog.com leads the charge to inform individual inventors of invention submission scams. Indeed, if you type "invention submission" into Google, Yahoo or MSN, IPWatchdog.com's "The Truth About Invention Submission," a detailed expose and warning, is the first page that appears in the free rankings.
IPBiz has discussed PageRank: