Optionalcredit_The amount available to spend per month.
Optionalcredit_The total amount of credit left for this promotion.
OptionaldescriptionA detailed description of this promotion.
Optionalexpire_When this promotion's credits expire.
Optionalimage_The location of an image for this promotion.
Optionalservice_The service to which this promotion applies.
OptionalsummaryShort details of this promotion.
Optionalthis_The amount of credit left for this month for this promotion.
Read-only Promotions generally offer a set amount of credit that can be used toward your Linode services, and the promotion expires after a specified date. As well, a monthly cap on the promotional offer is set.
Simply put, a promotion offers a certain amount of credit month, until either the expiration date is passed, or until the total promotional credit is used, whichever comes first.