In India there are many ad-networks(other than Adsense) who pay per acquisition or per lead. So Javascript ad code is not required(as fraud clicks don't matter as long as one converts).

So an ad network will have many companies and each company will have many banner sizes for ads. Also suddenly any ad may be stopped just because company's target has met. Which is a common nuisance since if we don't remove those url's then that company will get conversions for free.

I've a dozen sites and removing the ads are difficult every now and then. Also CPA based ads may not convert at all. That means I'll need to remove non-performing ads regularly.

I've gone through: How can I show multiple ad networks on my site? . I've also visited DFP solution but without Adsense they wouldn't let me open account.

I want to make an ad server wherein I'll feed new ads (banner image + link for click). I want to maintain categories there like ( shoes, phones, books etc). So if an ad is paused - i'll simply remove/pause the ad there while other ads in the category keep running. Also changing ad code within sites will no more be required.

For example - let me have an ad category "clothing" where I can add ads from different companies. So if one of my site requests an ad from there it'll randomly select an ad in this category and return it to site for display. Removing/adding ads within this category will not affect the site requesting those ads.

Any idea how to implement it?