I agree that this must be the way how bidbots should do business. Just like an advertise in a news paper. You pay for the space without a guarantee of any return.
You just pay the fees for an advertising/promotional space without draining the prize pool. I like your ideas. This is how it should be!
I am unsure how it would be organised but, I think if it is for promotional reasons, it should be treated something like this at least.