I can't find one 728 x 90 banner to promote any of your sites with.
Who is going to put a 725x297 banner on their site? That's half the size of a laptop screen.
Who thinks up these sizes?
You should have the option for $25 per signup at campaign selection time, not have to write to you asking for it.
Great content, shame about the ad tools.
I'd like to know about the cross-sales too before I put up any banners.