I didn't, because I vaguely remembered reading that discussing CPC could get your account terminated. Now that I look at it, it seems like that applies to AdSen

I didn't, because I vaguely remembered reading that discussing CPC could get your account terminated. Now that I look at it, it seems like that applies to AdSense, not AdWords. I did this a while ago so I don't remember the exact number, but it was on the order of 300 clicks.