Martin, CW,

taking an objective look at this could reveal that both Yahoo and the partner engine both enjoy a short term benefit from Yahoo's less than vigilant approach to spurious clicks. Long term Yahoo loses as its brand is associated with theft.

Kjell,

I agree with your point. I've withdrawn most of my client sites from the Yahoo programme. Mainly due to the inferiority of their conversion costs. Sadly, I'm unhappy to be so dependent on Google.

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