CO-SENDER uses the pre-paid method, which means that a plan takes effect once you pay for it. Payments are performed regularly each month, on the same calendar day of the month. A plan can be purchased at any time and will become valid immediately after the expiration of the current plan.
Purchasing a plan 3 days before the current plan's deadline is recommended in order to ensure the smooth execution of all campaigns planned in advance in case of monetary transaction delays. If payment is not received on time, your plan will be changed to the Free version, and all campaigns will be suspended. An invoice will be sent out after a successful payment.