Originally Posted by Sly

Here is what is happening. The original poster most likely is running a general RON campaign. He can set a $20 daily budget, but the campaign is going to run so fast that the Exo system is not going to be able to turn the banners off fast enough. This means that his $20 daily budget will be overshot by hundreds of dollars, which he doesn't have, and Exo will have to cover the bill. Mark explained this above.

OP: Try creating a more targeted campaign. Don't be general, purchase exactly what you want. They will then approve your request because you don't run the risk of them losing money on your campaign.