Here's my plan of action:
1. Buy $300 Target gift card now at Kroger, I have an Amex that gives 5%
back for grocery purchases = $15 savings
2. I'll receive 600 Kroger fuel points for the $300 purchase, when used to
the maximum extent possible (buying 35 gallons of fuel at once, totally
possible for me as we always fill up 2 cars at once as well as 2 gas cans)
this gives a savings of $21
3. Use the $300 Target GC bought at Kroger to buy $330 of Target GC via this
promo
Total $264 out of pocket gets me $330 in Target GC