Different Pricing Module?

CSUB would be perfect for me except for your pricing model. It is quite normal to entice people into a first level of service at no charge just to get them to register. Once the register, you entice them to buy a subscription to a premier service.
If I could by CSUBs based on how many people bought into the premier service, it would be a no-brainer. But, at this point, I suspect I will only get 5-10% to buy into it. So paying for all registered users doens't make sense for me (and I suspect for most people). Othewise, it looks absolutely perfect. Sigh.
Any chance of another pricing model?

The initial pricing model we intended to release with was exactly as you're wanting. You only pay for what you use, but due to user feedback we went for the current pricing model as the one initially planned was thought confusing. I apologize if the pricing model does not fit your budget, but this is the model determined most acceptable.