MCC - Merchant Code Category - for RewardGateway?

RewardGateway is a shopping portal similar to eBates (Rakuten 🤮 )and others, offered through employers...and one of the opportunities are InstaCards, which would be like Flux where you purchase a gift card prior to purchase at a discount for participating retailers.

Hunting and hunting to get the MCC ~ anyone here might know?
LMK if there is a more appropriate forum for post.