I will try to remember to post here if I see any One Card reload promotions. There were so many recent ones - Mother's / Father's Day (get RM5 for each RM100) and Raya (get RM15 for each RM100).

Tip: This is a really good way to pay for stores where they either only accept cash (e.g. many of the smaller eateries) or impose a RM50 limit for using credit cards. For example, I always pay for Infusion Coffee, Go Noodle, Bison Cafe, AK Noodles, Old Siam etc using One Card. Can also convert to parking credits. It is awesome.