I haven't used Dialogflow so I'm not much help for your questions directly, but I know that Google people sometimes respond to Stack Overflow questions. It mig

I haven't used Dialogflow so I'm not much help for your questions directly, but I know that Google people sometimes respond to Stack Overflow questions. It might be useful to take this question to Stack Overflow (as one or more questions). If the pricing is confusing, I bet other people would benefit from having the answer in a convenient format like that too.