Pretty soon, I'm moving my biggest site over to an entirely new format. It will no longer have a left bar or use a skyscraper ad. Unfortunately, that one happens to be pulling in over 80% of my Adsense income. I was wondering if I'm going to lose all of my Adsense "bids" on that ad, if I change its size to something else? For instance, this ad named "left ad all pages" will be in the same channel and all, but will appear as a box ad rather than a skyscraper. (what I mean by "bids" are when someone clicks the "advertise here" link and goes through the bidding process to appear for it)
I guess Advertise Here is no longer exists for new ad code. Secondly, Large Rectangle normally works better than skyscraper, at least it worked for me.
Is it no longer available at all, even through Adsense? I'm surprised. I guess there's nothing to lose if you switch around your old ads? These ads have been untouched for well over a year and a half. That's the one I'm going with - large rectangle.