Warbond pledges (or WB for short) are special promotions offered through the year that may include a price discount and/or special items, like extended insurance plans or special ship paints. These pledges can be obtained via new orders using new currency (no store credit) through the pledge store. the pledge store. Store credit cannot be applied to these orders.
Check the pledge name if you are receiving an error when attempting to use store credit. Warbond or WB in the name means you will need to use another payment method that does not include store credit.
Warbond Ship Upgrades (CCUs)
As with almost all upgrade pledges, purchasing an upgrade to your given ship pledge will only upgrade the ship to the noted upgrade target, such as upgrading an Aurora MR to a Sabre. In this case, the upgrade will only change the ship to the Sabre and nothing else in the pledge will be altered or added. This includes Warbond ship upgrades, which will not give anything included in the normal Warbond ship pledge except for the ship.
In some special cases, if anything additional is included in the upgrade purchase, it will be listed on the upgrade itself. An example is pictured below is a special subscriber upgrade package for upgrading an Aurora MR to a Sabre:
For more detailed information on ship upgrades, see our guide here: Ship Upgrades (CCUs)