Metering
Billed on what the platform measures, not on what a quote assumed
Compute hours, storage actually allocated, and egress counted at the gateway are metered at the service layer. The same numbers appear on the invoice, so a line item can be traced back to the workload that produced it. Where a rate is not published, it is quoted per engagement rather than estimated from a table.
A price you cannot trace to a measurement is not a transparent price.