Yes, I still using Coke rewards.
Half of my reward points came from ebay bids that I won as half cost what a coke bottles's cost. Sometimes, I picked them up off the streets or friend's places. Of course, I do still drinking Coca~cola anyday but watching my drinking, not too much.
Last time I used points to get $50 dollars rebate for Sony (purchased Sony's PSP)....then I haven't use any points but kept adding up my reward points.
Some good and some bad on reward stuffs.