Any telco has been separating out call data records, billing rules and billing for years.
You should also differentiate between selling a product/plan and fulfilling it.
What you sell and what you fulfill are two different things, one is a price, the other is a cost, one is a product/PLU, the other is a SKU.
So what you're selling is a plan, which is a subscription, which has a price and other billing related stuff (periods, expiries, seats etc). The outcome of that is revenue. There may be wrinkles like discounts and coupons and free periods and etc, but that's all on your sales and billing side.
What you supply is features/services/logins etc. They have costs/expenses.
There needs to be a map between the PLU(s) and the SKU(s).
You should also differentiate between selling a product/plan and fulfilling it.
What you sell and what you fulfill are two different things, one is a price, the other is a cost, one is a product/PLU, the other is a SKU.
So what you're selling is a plan, which is a subscription, which has a price and other billing related stuff (periods, expiries, seats etc). The outcome of that is revenue. There may be wrinkles like discounts and coupons and free periods and etc, but that's all on your sales and billing side.
What you supply is features/services/logins etc. They have costs/expenses.
There needs to be a map between the PLU(s) and the SKU(s).