Grammarly Pro subscription rates are listed per member. If you invite more members to a Grammarly Pro plan, extra seats will incur an additional fee based on your selected subscription. The fee is prorated based on the remaining days in the current subscription period.
If you accidentally invited additional members, remove them from your plan on the Members page and contact Support for further assistance.
Note: Currently, Grammarly does not issue automatic refunds when a member is removed from a team plan.