I am an affiliate coordinator for an in-house affiliate program. We focus mainly on a niche market, beauty and cosmetics. Most of our affiliates are content based and heavily uses social media.

I would like to expand our affiliates to another category, paid search. Do you have any helpful tips on where to start researching this area and where to find potential affiliates who use paid search? I have tried tracking competitor affiliates through various keywords and websites such as KeywordSpy, but haven't had very many leads. Any ideas and suggestions are welcome.