No, most don't, but some require you to clear with your affiliate manager first. Questions like these should be asked specifically to your AM since they have a better understanding of the rules than we do. Remember, our forum is based on bending/breaking the rules . Good luck!
Nope, it's perfectly fine. A lot of the big networks I know are perfectly fine with it and are even suggesting this type of advertising to new affiliates.
What does this have to do with Network Armageddon? I thought it was some kind of a network or an offer or something.