Is this smart pricing?

way up, way down, way up again

[dibbern2]

I'm puzzled by a set of topic pages that have been getting $2 clicks one day, then 5-cent clicks the next. I was about to pull AS off for a few days, but suddenly the average click returned to the $1.50+range. I'm betting tomorrow will be another 5-cent day.

Its not sitewide; affecting only one topic/section (channel) out of a dozen.

Is this smart pricing? Any other ideas?
Thanks.

[ZenArcher]

I have had similar, inexplicable, fluctuations. I try to look at a week's worth of data before making any firm conclusions about what could be going on.