This is Google most controversed theme these days. There is a little war against Google and his practice of ads marketing. Some say that this practice breaks the trademark law, Google says it doesn’t. All we know that they are making lots of money with this thing.

Opinion about these ad pages is divided. Some say they are frustrating junk pages. Others, including those who speculate on potential traffic of a specific domain name, say they help people find information related to what they’re looking for.

“We want those pages to function as alternatives to search engines,” said Matthew Bentley, chief strategy officer for Sedo, a parking service that manages more than 1 million unused addresses placed with the Google ad network.

The parked ad pages are mostly unattractive, but Sedo, Google and Yahoo! said they are working to improve them by adding more information. The parking service usually handles the creation of the ad sites.

So Google is not the only one doing this.

Wall Street analysts estimated slightly less than half of Google’s $6 billion in revenue last year came from ads shown on partner sites.

The Washington Post found hundreds of active Web sites showing Google ads at addresses that appear to be misspelled variations of well-known company names, known as “typo-domains.” Their owners are known as “typosquatters.” So now you can imagine how profitable this practice is.

Take for example Verizon Wireless:

Nearly a dozen sites with variations of “Verizon Wireless” were showing Google ads, with some linked to the company’s official VerizonWireless.com. That suggests Verizon Wireless may be paying Google for ads on typosquatter-owned sites.

Verizon Wireless spokesman John Johnson said the company has a successful track record of getting such sites shut down and takes “a particularly dim view of typosquatters.”

“Do we think any traffic is good traffic as long as it ends up at our site? Clearly many of these sites are siphoning off traffic by tricking people … This is never a good thing for our trademark or our company,” he said. But is this the truth? I mean we all know that every bit of publicity is good, even if it comes from other sources.