When a member is removed during the billing period, we will not charge you the full price for this user. Because you have already paid a full price, we'll add pro-rated amount of credits to your account as a refund for the time you've pre-paid but did not use.
You are on a Garage plan and have 3 users in your team. This means you are paying $8.99 x 3 = $26.97 monthly.
When you remove a single member in the middle of your billing period, you will be refunded half of price for a single member: $8.99 / 2 = $4.50 in credits
This means you will get a $4.50 discount on your next month's payment.