Additional members are automatically counted when they're invited to your Team.

If a member doesn’t accept the invitation within 30 days, they'll be removed from the count of members.

Removing active members doesn't immediately free up a spot for new members. You will gain one more spot in your member count 30 days after removing a different member.

Please note removing a member will remove their connections from the system (except for any connections that have been added to a list already).