Charging for blocks offers the predictability and simplicity of an all-you-can-eat buffet. Straightforward cost estimation, and a safety net against unexpected spikes in usage.

Per-call pricing allows users to precisely tailor their budget, and ensure they only pay for what they truly need. They can set custom limits to enforce their budget, or design an elastic strategy using custom alerts. And this flexibility ensures they'll enjoy savings when usage dips below planned expectations.

Why not serve both segments?