Subscription plans are prorated daily based on the number of channel users.
The invoice amount will be automatically adjusted and charged at the end of the billing cycle to the payment method on file. A decrease in channel users will result in a credit towards the next invoice amount.
In other words, you'll only pay based on the number of channel users and how long they are in the Matter-connected Slack/Teams channel.
Note: For annual subscriptions that have an increase in team members (i.e., an increase in cost), the prorated adjustment will be billed 30 days from the channel user increase or the next month after the last charge - whichever date comes earlier. Whereas monthly subscriptions will keep the same billing cycle.