Save an additional 5% w/REDcard.

NOTE: Target apparently deducts the $5 savings when calculating the value of the specialty card.

A test run of a Happy GC resulted as follows:
$100.00 card
-$5.00 (value of promotional Target card)
= $95.00 subtotal
less $ 4.75 (5% REDcard savings on subtotal)
= $90.25 oop + free $5 Target GC

alternatively, Outback is also giving $10 Bonus Card on each $50 GC purchase. Depending which suits you better (since the bonus card has a set redeem window and can’t be used w/other coupons), you might wish to compare the offers for best value in your situation.
https://www.outback.com/gift-cards