Bear in mind the difference between 1000 RZ points and a Gift Card. RZ certs have to be used in full in a single transaction and expire 90 days after they're issued. And this is enough points that anyone whose not a Silver member will be auto-issed a certificate. Not a huge deal since these certs will be active during the holiday shopping season, but it's definitely less flexible than an open-ended Gift Card.
But RZ certs are deducted pre-tax, and a gift card is deducted post-tax. If I use a $20 RZ cert on a $59.99 game, I'll only get taxed on $39.99. Tax for me is between 7 and 10 percent, depending on which county/city I buy in, so it's a fairly significant consideration.