Fewer Ink results in Overture?

Anyone else seeing this in the past week?

[wooden]

Several clients of mine saw about 50% fewer Ink listings in Overture/Go.com search results this past week. Anyone else notice anything like this?

[DonRoss]

I would say this is due to Match Driver. There will be less Ink results at the top of the SERPs due to Overture matching virtually every phrase with a similar one that someone has already bid on, and returning that listing.

[wooden]

Can you provide details or a URL about Match Driver? I'm not familiar with it. Thanks, Don.

[wooden]

Never mind. Found it in this section.