Download the Buddies app for iOS or Android and  register. You can also get an extra 200 point with referral code: CDAVIEBFFB at registration.
They give you 700 points when you register, which is enough for a Free bag of Blue Buffalo Dog Treats. To get those go to rewards, then redeem. It might take a minute or two for the 700 points to show up.
Update– It was working slow before, but seems to be loading better now.