First, please see here for reference for all details regarding the gift card distribution Count.It offers PRO groups.

Count.It is hoping to offer a range of currency options for gift cards in supported regions (like Amazon in the UK) but for now, the best practice is when creating your challenge, select the "Other Misc" option in the Reward Type drop down menu and then write in the reward as such - noting the mention of Count.It to fulfill:

Upon the official ending of the challenge, Count.It will then contact the Admin for confirmation on winners' countries of distribution and billing will be updated after they are fulfilled.