Download the Harry's SG App and sign up using my referral code to get $10 voucher (can use in NTUC/giant etc).?

Download the Harry's SG App and sign up using my referral code BnRkjfJd and get 100 points immediately!
Go to the OCBC stack website and register @ https://www.stackreward.com (you don't need to be an OCBC card holder)
After register, link your OCBC stack account with your Harry’s account by clicking add
Press on the menu button and look for marketplace > shop
Look for the voucher you want and redeem your voucher using your Harry’s points!