Power BI embedded capacity billing

Hi, I am currently working out our price structure as an ISV, but am quite confused how the bill for embedded capacity is calculated.

We are just starting this project up, so are looking to buy a A1 node to provide capacity for our first customer, but I am concerned if they counted hours for each individual instance of use, for example that if 10 users consumed our reports at the same time it would be billed times 10.

Or does it work like normal hosting which is billed by the total uptime without regards for how many views the reports gets?

Thanks in advance.