the exclusive promo does not have incremental ADB condition. It is on entire balance. I know what you are suggesting, but it should not apply to the exclusive invite. Hence possibility of system messup with what you are suggesting.
Prevailing and Bonus Interest Rates
3. Under this Promotion, you will be eligible to receive prevailing interest (“Prevailing Interest”) on your entire deposit balance (“Deposit Balance”) in the Qualifying Account(s), at the prevailing interest rate of 0.05% p.a.
4. In addition to Prevailing Interest, if you meet the eligibility criteria in Clause 2 above, you will also earn the relevant bonus interest ("Bonus Interest") at the relevant bonus interest rates as stated in Clause 5 (each such rate to be referred to as a “Bonus Interest Rate”) on the first S$5,000,000 of the average daily balance (“ADB”) in your Qualifying Account(s), during the Promotion Period, subject to the following:
a. The ADB in your Qualifying Account(s) is used to determine the amount of Bonus Interest you are entitled to receive during the Promotion Period; b. ADB is the sum of end-of-day account balances of all days in a particular calendar month, divided by the number of days in that month, where “end-of-day account balances” means account balances as of 2359 hours of each day

I know what I'm talking about. I don't have any issues with exclusive promotion. No system mess-up for me.