If you cancel a voucher within the allowed window or request a refund, Groupon often issues the funds back to your account as Bucks rather than to your original payment method.
You can earn $10 in Groupon Bucks for each friend who signs up using your referral link and makes a purchase. buy groupon bucks
While you cannot directly purchase Groupon Bucks like a gift card, they can be acquired through several methods. How to Get Groupon Bucks If you cancel a voucher within the allowed
Unused Bucks stay in your account and are applied to your next deal automatically. How to Get Groupon Bucks Unused Bucks stay
Groupon occasionally offers promotional Bucks (e.g., "$10 in Bucks for your next purchase") for buying specific local deals within a set timeframe.
How do I use my Groupon bucks? The purchase ... - JustAnswer