I think it is because of the ad targetting...I had some non-relevant ads showing up, so I banned them, and then only got 1 ad per block...took off the ad blocking and am back to getting 3...
Ned, i think ctr goes up/down but it really depends on your traffic etc. I don't think some BLANK spots will really cause your ctr to drop significantly.
More blank= less links= less possible click targets. If a a rectangle makes two links instead of three that means 33% less links.
I totally agree. With three ads your visitor has an chance to see something that interests them more than if you have one or two. Yahoo needs to fix their problem with ad targeting. They could really compete with Google if they could just get this worked out IMO
Now that you explain it in that way i understand completely. YPN is so legit/honest/helpful/good but at the same time so sketchy with little fuckups like 2 links on an ad page instead of 3. Or putting candian/spanish ads on our websites so they get paid for the clicks but WE DONT! that is not ethical etc and i think ypn should clean it up...
personally, i like the 2 ads in the 728's. wish i could compare its performance. my 728's performance dropped when they went from 4 to 3 ads.
The same thing has happened to me....going from three to two and back again. I guess that the kinks are not worked out?! Good Luck!