So far as the 336X280 sized ads are concerned, which generates the better earnings? Image ads, or text ads?
It doesn't matter whether it is an image ad or text, CPC can vary depending on niche and advertising competition.
Thanks for the feedback. I have the 336X280 ad on my website changed to display both TEXT & IMAGE ads . . . hope it works!
For me text ads is much more better. Lot of high paying keyword are used text ads rather than image ads.