The flat monthly fee is the same amount a subscriber can expect to pay each month. Determined by the syndication creator, they have the ability to set this amount at any level. This fee is charged at the beginning of each billing cycle.
How does it work?
Suppose, you are interested in a syndication with a flat monthly fee of $10. As soon as you subscribe to the syndication, your billing cycle will begin and a $10 invoice will be generated. Which can be viewed under Billing. In the following month, your next invoice will be generated the same day. Meaning that if you first subscribed on June 10, your next invoice would be due on July 10.