Re: Who Uses Spyfu?
I've used all of the above mentioned tools, and the one thing I have to say is that they lack an API. Really you can get a lot of the same information programatically by querying the AdWords or YSN API, and you can aggregate the data much faster.
That being said, scraping live ads like these services appear to do does have it's own merits, and I would have to agree with what the previous posters said.
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