Loyalty Card For Herbal Jelly?

Went to pay my respects to my Granny at the temple today and stopped by the Herbal Jelly shop along Balestier Road. The Herbal Jelly was good but I was surprised when the lady at the shop gave me a stamp-collection card when she returned my change to me. She told me that I will get one free serving of Herbal Jelly after I made 10 purchases. Wow! Now even Herbal Jelly also got loyalty program. Haha.