I'm thinking about doing this one. The way I would do it is to use my AMEX BCP to buy the $100 MC GC + pay the $5.95 fee. I get 6% cash back on grocery purchases, so that's a shade over $6, basically cancelling out the GC processing fee.
What I get in return is a $10 Vons coupon (good for 2 wks in the past). However, I would still need to liquidate the MC GC. Now that my local VR sellers aren't allowing GC for payment anymore, the best ways to liquidate the MC GC would be Amazon Payments or Target AMEX. This is too much work for a $10 coupon, but if I could do it 3-4 times, it would be worth it.