You are not able to use it until it is empty. You are paying for X pages a month. If you have printed X pages, you need to pay more.
You don't need to use the subscription model to use a printer, you can use regular cartridges.
You don't need to use the subscription model to use a printer, you can use regular cartridges.
I'm not suggesting they violated their agreement with the user, I'm saying that the terms of the agreement could have been more clearly communicated.