Please refer to the actual t&cs:
https://av.sc.com/sg/content/docs/sg-esaver-account-tnc.pdf
4. “Customers with wealth holdings” are defined as customers who hold either an Eligible Investment Product or Insurance Product purchased through the bank. An “Eligible Investment Product” refers to (i) Unit Trust(s), (ii) Bonds, (iii) Structured Notes, or (iv)
Equities.
5. Your eligible Bonus Interest Rate is assessed based on your wealth holdings at the end of each calendar month during the promotion period.
Did your RM have a different interpretation of the t&cs ?