如果在当前订购的基础上增加许可证，我应该支付多少费用？

When you add more licenses to your subscription, you’ll pay a one-time prorated amount to cover the time between when you add the licenses and your next billing cycle.

For example, if your current monthly billing cycle renews in 30 days and you add one extra license today, you’ll see a message like this:

“This will change the number of licenses to 3. You’ll be charged a one-time prorated payment of $3 in order to add 1 license to your subscription that covers the time between now and your next billing cycle on April 18.”

The exact amount you’ll be charged depends on the time when you add the license and your subscription plan’s per-license price.