Misunderstanding on pricing for Dialogflow CX

[a_train]

I am looking at pricing of Dialogflow but can't understand a detail.

Can someone please explain how we can have 50% of intent-based queries ? Aren't intents always checked on queries and when none is found then generative becomes an option ?


Use case from https://cloud.google.com/generative-ai-app-builder/pricing 

Example of mixing intent-based and generative answers: Customer Support on Website

• Intent-based, deterministic flows are used for some customer-specific questions (Billing, Payment)
• Generative answers used to handle questions where no intent defined but answer is on the website

Assumptions:

• 100M annual website visits
• 5% of visitors use the chatbot, 3 queries per use, 50% generative, 50% intent-based

SKU Volume Rate Total List PriceDialogflow CX Chat (intent-based)Dialogflow CX Enterprise Chat (generative)Data Indexed

7.5M annual 100M*5% use*3 queries*50% intent-based	* $7.00 / 1k queries =	$52,500
7.5M annual 100M*5% use*3 queries*50% generative	* $12.00 / 1k queries =	$90,000
50GB annual 10GB free so 40GB used in price calc	* $5.00 / GB * 12 month =	$2,400