What's your backup revenue plan in event of an adsense ban?
I would probably work with other ad networks, but that wouldn't be cost effective to monetize my long tail of smaller sites. It would lead to a significant, if not huge, drop in revenue.
You do get in personal contact with people at Google starting at some level of revenue though. So if it ever happened, I guess I would see it coming in some way.
Or the market you were operating in?
I can't imagine that a publisher doing 25 million of revenue per year couldn't get in touch with anyone at Google.
What makes Adsense unique?