Hello folks,
I am managing a free global advertising site. Right now my site is getting about 200-300 impressions a day. I am showing adsense ads with sizes 728*90,250*250 and 180*150.
I have come across a theme that provides me with option of showing 300*250,336*280 and 728*90(I have read that they are the best ad slot sizes). The theme costs about $45. So it worth the investment ?