I am not for a long time in that business that's why I have such question. We already connect to our new search engine such providers as Kanoodle, Search123, Searchfeed but as I see GoClick, Ah-ha, FindWhat, Overture, Google have much better bids for almost all keywords.
I didn't receive reply from several of them. But I didn't apply to Google or Overture because they ask too large minumum searches per month. now we don't have so much. FindWhat tells that: "I am not sure if FindWhat.com will partner with other Pay Per Click Search Engines. If we decide to, I will contact you." It look very strange for me.
So I would like to ask HOW to connect good (with better bids) XML providers and which ones? To start is really hard and we want to connect best providers but it look like that are pretty happy without us :)