Payback has always been useful for vodafone recharges n getting discounts on MMT. I just use it on these 2 sites n im extremely happy. I once redeemed 9000 points to get ts rs2250 discount on a 1 way flight tkt from mumbai to delhi but didnt use it.i mailed them n got it reversed in 10 days.so for me they are awesome.sorry 4 others.but I wish we could earn more points on purchases n also they should divide ppl into 3 groups.mayb bronze, silver or gold so that we earn more points as per category.coz for petrol worth rs5000 at HP I got 50 points.this is sad.