On other fare categories, unlimited complimentary upgrades are also available, but within a certain number of days of departure, according to status level. (rewardexpert.com)
Other fares include seats, luggage or food and more flexible terms. (dreamtravelonpoints.com)
Other fares increase in a general $ 49, $ 79, $ 99, $ 129 format depending on route length with some variations. (upgradedpoints.com)