Visa "Extras"

Even though I've had my Visa debit card for about 6 years now, I just signed up to Visa "Extras" Reward Points system. It was only until after I signed up that I noticed how ridiculous these "extras" really were. Every $1 I spend is a point. So far, one of the cheapest things that I've found on the site was a $5 Subway giftcard for 3200 points. Meaning... I would have to spend $3,200 for a $5 giftcard. That's pretty pathetic... Why even bother?!