[jajern]

You pay per second of usage and the ACU starts and shuts down automatically. If your DB is only actually accessed a occasionally then you are not paying for 24hrs of usage. I think the auto-scaling is the draw though, not necessarily the price. So you are only getting charged the the database is being accessed. I think the examples on the pricing page make it a little more clear.

[jchanimal]

FaunaDB Serverless Cloud has global ACID transactions with per-request pricing. You can optimize your queries for cost by looking at the response headers, or support your organization with an on-premise multitenant cluster. Learn more about pricing and features here https://fauna.com/serverless

[k__]

Would be strange if it was otherwise.

The whole serverless stuff only pays if you have highly varying loads OR want to save of Ops staff.