I read the TnC as qualifying for bonus interest(BI) depends on the end of day amt on 30 Jun as compared to 31 May. The ADB is for calculation of the BI. If need to maintain amt throughout the period of Jun to Aug, it may be better off putting in short 3mth FD instead.My interpretation is same as yours, so long last day of mth balance >= 31 May, you will get bonus interest. If you are worried, chat with scb, if there is a chat in the app, me not an app user nor did I receive the invite. Even if I get invite, I will still keep my funds with another bank more than 4%