ken_b - 8:46 pm on Feb 7, 2011 (gmt 0)
From the link Netmeg posted (I added BOLD to a few important words)
What does this mean for you as a publisher? If you’ve
previously selected ‘Show public service ads’
in the ‘Backup ads’ section of the new AdSense interface (or the ‘Alternate ads or colors’ section in the old AdSense interface),
you’ll begin to see
that when we’re unable to serve paid ads to your pages,
a blank space
will appear instead of a PSA.
Sounds like going back through your ad code and modifying it could be the order of the day for publishers who chose to show PSAs. Got ads in a hundred channels and a spare afternoon to fix that? :)
I kinda like showing a PSA now and then. I think it is good PR for a site.