The CPI functionality for updating prices on billing schedules based on price indexes cannot be used for items of type Usage. This limitation makes the functionality unusable for companies that rely on this item type. We use the Subscription Billing module to invoice cloud subscriptions based on the number of users, which varies each month. Additionally, those users are billed using tiered pricing. We need the base prices for each tier—defined in the trade agreements—to be updated with CPI adjustments, just like other item prices.