Most pay $.01 to $.10 a click. But the person actually has to make a search for you to get credit for it. Some words pay more and some pay less.
All kinds of companies offer search feeds. Other companies like webanyway (not a direct feed but do offer xml feeds) you can sign up for their program and get an xml feed through them. They pay a percentage of every bid. Well, most feeds do this normally between 50% through 95% (which equals the 1 to 10 cents).
Most have min. payouts of around $50 unless you do the ones that have indirect xml feeds (example webanyway, gofeed, etc) then the min. payout is a lot lower like $5.00).
Hope that makes some sense and sort of answers your question.