I have used many types of ads with various sizes but when placement-targeting launched I decided to use 300x250 format and my earning gradually increased, how about you and now I only use that size
What about putting two 336 x 280 rectangles together (stick with each other)... Does it have a bad effect?
I have used 200x200 then I changed to 336 x 280, I got 4 times of clicks more than before. But only the first day, the 2nd day, 3rd day, ... it is back to normal. No difference.
But it requires two steps, right? When someone clicks on a link unit, it opens a new page containing ads. And I assume the click doesn't count unless the visitor clicks twice.
How can you set only image ads? I see that future only on referral ads and not with ordinary ads. Am I missing something here?