Additional Bookings and Custom Features
Additional bookings can be purchased in Plans&Prices // Additional items. Unlike bookings included into the subscription, additional bookings do not have expiration date (unless it is written in the pack title). If you purchase such additional bookings, they will not expire until you use all of them.
Additional Custom Features
You can purchase additional Custom Features in Plans&Prices // Additional items. Additional Custom Features are purchased for a year(unless different period is indicated).