Windows Store Cards for reduced Bing credits $5 for 325 credits, $10 for $650 credits
https://www.bing.com/rewards/redeem/000100000214
I believe these cards can be used for Xbox Live purchases also.
They also have 12 month live Gold membership for 2899 credits, but this may be a targeted offer. 2899 credits works out to about $30 when compared to redeeming credits for Amazon GC's or other items.
https://www.bing.com/rewards/redeem/000100000190
https://www.bing.com/rewards/redeem/000100000214
I believe these cards can be used for Xbox Live purchases also.
They also have 12 month live Gold membership for 2899 credits, but this may be a targeted offer. 2899 credits works out to about $30 when compared to redeeming credits for Amazon GC's or other items.
https://www.bing.com/rewards/redeem/000100000190