There are different spytools that can be purchased today designed to detect profitable PPC campaigns for there owners. Some of which are Adspypro, PPC Bully, GCD and Spyfu amongst others.
It has been my own opinion(and the view of many others) that for a period of time Google Cash Detective has fallen behind the pack when it comes to spy tools. That is all about to be remedied however with the coming release of Google Cash Detective 2.
The features for the updated version of GCD will place it well ahead of it's major contenders, launching it to become the most valued spy tool available on the internet today!
There are no limits, I will repeat that, there are no limits on the number of keywords that you can find data for. Google Cash Detective 2 presently tracks more than 2.5 million keywords, all accessable from its extremely fast database.
With GCD 2 you can search on a keyword or a url.As an example if you search for http://*clickbank*, Google Cash Detective 2 will return a list of urls promoting clickbank products allowing you to find profitable campaigns that you can copy and use for yourself, this is not only amazing, but it is also very powerful.
Discover which adword ads are profitable along with the keywords being used, and you can also directly view the associated landing pages.
Unlike other PPC spy tools, with GCD 2 when you do a keyword or url search you will instantly be presented with the results. No 2, 3 or 4 week wait while the data is collected, as Google Cash Detective 2 has months of daily data stored on those 2.5 million plus keywords, just waiting to be retrieved and used to create profitable PPC campaigns for those who have access to this incredibly valuable tool.