There should be some additional features for IPS advertisements such as:

1) Show expiration date for banners to customers.

2) Show an advertising banner when spot is free and replace it only if a user buys the banner spot with his advertising banner.

3) Option to preorder banner before expiration date for higher price.

4) more advertising spots and options.

Edited December 16, 20177 yr by Maxtor

I'd also like to add

5)  The ability for a buyer to change their banner themselves by uploading a replacement one