Google AdWords Feature: AdSense for Domains Opt Out

Should you opt for the new AdSense for Domains opt out feature, quietly launched with the Google AdWords upgraded Site Exclusion tool?

(Author’s Note: This is a long overdue followup to Google AdWords & Domain Parking : Garbage Paid Search?)

The site exclusion tool applies to the content network. However, notice what happens if you click on the “Page Types” tab from within a pure search advertising campaign:

Google issues the following, confusing alert:

This campaign is not opted in to the content network. Most site and category exclusions do not apply to this campaign.

However, domain parking ads have clearly been running in this *search-only* advertising campaign. Via the checkbox, it is now possible to block this traffic. Do so if the conversions are poor. In the above case, NONE of the 916 clicks resulted in a conversion. Why?

Because the traffic being routed through the search network from these parked domains is not the generic keyword searches promised by Google.
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