Thanks a lot for your kind response, Daniel
>Would you be using the same ad provider for each ad, or different ad providers?
Usually... I want to use different providers. But for better starting I will depend on one provider at first and will look further in future. I have a clear decision on that
>how do the script tags differ between time intervals?
Sorry Daniel ! I don't understand what this mean. Can you please elaborate
Such a functionality in a form of plugin as I requested would help Multisite users a lot. I am sure of it but not an expert in plugin creation :) Hope you help us