Lol, such as butt-ugly banners like these two below:
https://s3.amazonaws.com/teddysgirls...ys_banner2.png
https://s3.amazonaws.com/teddysgirls...dys_banner.png
Yeah sure, those will surely get those visitors all excited! I feel ya, there are far worse out there. Or simply just a lot of the ad tools being heavily outdated. There are some affiliate programs out there, Paperstreetcash being one of them for example, that will make custom banners for you upon request.
Else, Photoshop is easy to learn and allows you to fix yourself some banners that match your own colors and branding. And the option to add glitters... Don't forget to sparkle some animated glitters on top of that MOFO and save it as a GIF... That always does the trick!
