backdraft7 - 1:45 pm on May 26, 2012 (gmt 0)
Just to carry over the sales conversion via traffic shaping theory, I'm not saying that Google uses conversions to throttle traffic, it's just the reverse...they throttle traffic and the natural result is loss of sales. This requires very little computational power, just some simple statistics.
They slash 50% of my highly related terms for no apparent reason. The other 50% that remain are basically equally weighted across the site, I detect no keyword loading using my site analysis software, yet they -100 just half my site's keyphrases. Very suspect.
I have verified no manual penalty via a re-inclusion request.
Now, the question of motivation? That's easy - to force you to increase Adwords spending. I've been a loyal adwords customer for 10 years. So long in fact that I think I may even have grandfathered 5 cent bids on my account. This may be a way to push me to spend more. Believe me, I'm not the only one with this "crazy" notion. I just call 'em like I see 'em.