I suspect explaining that pricing model is a sales risk. flat fee or price per contact is far more intuitive I suspect. Even reading your explanation, I'm not

I suspect explaining that pricing model is a sales risk. flat fee or price per contact is far more intuitive I suspect. Even reading your explanation, I'm not clear on what it will cost me -- this sounds more like pre-paying? how long should it wait between batches? how effective will batching be? Rumors of phishing/testing could move quick in the organisation making the report outcome misleading.