I don't think Raise manipulates the prices for eShop cards unless they are the seller behind the codes. I sold a Starbucks card on Raise and set the discount myself.
well they must be because unlike PSN & XBL the eShop cards routinely have a worse discount when they do sales like this
right now everything is 5% off when before today's sale it was 6% off $20, 7% off $35, and 8% off $50 cards
and I bet you they'll go right back to those discounts tomorrow when this sale ends
edit: yep they're right back to 6-8% off today