You misspell British Airways, and British Airways ends up paying a toll to Google to get users to visit their site who wanted to go there anyway.

FORBES: Online Advertising

Did Safire ever misspell "cat"?

WSJ: 2011 Car Reviews: What Dan Neil Got Wrong | Rumble Seat

In November of that year Ulevitch met Halsey Minor, founder of Cnet, and the two came up with a novel idea for making money from the service: When users misspell a site's name, OpenDNS shows a redirection page, along with a collection of relevant ads.

FORBES: Magazine Article

One of the metrics that is used to gauge the format war is Google trends and HD DVD is clearly ranked considerably higher, but if you add the common misspellings of both formats the chart looks different and it is clear to see that many people misspell Blu-ray as Blue-ray.

ENGADGET: The format war: What's in a name? HD