How to create Campaign targeted to receive Bonus Gift Cards
Create campaign following this guide.
Select 'Auto redeem' checkbox within Campaign settings
Create/Edit Offer using following:
Recipients → Select: Use in Campaign - Gift
Gift type → Select: Gift Card
Gift Card Type → Select: Gift card type under which you need to create Bonus Gift Card
Theme → Select needed theme of Bonus Gift Card
Gift Card Amount → Amount of Bonus Gift Card
Make sure Gift card type → Number manager is configured: you specified Starting Number and Increment By