I was lucky to be surrounded by these Malls and every time I spend at the mall I will use my phone to capture the receipt image and send it. You don't need to queue up at the kiosk to scan the receipts. You can do it at your comfortable time and place using your mobile phone app. However, do note that you need to scan and upload the receipt with the next day.
My points are expiring on 30 June 2016. I managed to accumulate 40,000 points and was able to redeem $40 CapitaVoucher. The validity of the voucher is 1 year.
Who says you can't earn money by shopping? It pays to go around and check what type of rewards Programme is available. Besides CapitaStar, I Aso have JEM rewards app. However, I seldom shop at JEM, so I have not reached the amount to redeem any voucher.