Ann: Quarterly Activities Report and Appendix 4C, page-31

Not sure if you have understood the difference between the low cost platforms and big 4 banks quite fully, I reckon you might not have, as you missed the best low cost platform offering and top competitor within your list- GoMarkets

With big banks the cash account is kept at clients' full control, use it as your normal savings bank account on mobile app for transactions and get interest paid directly there when you have idle cash, and gomarkets is the only low cost broker who maintains that approach..

That gave me about $40 last month for my 100k net worth portfolio trading, 40dollars not a big chunk of money but more than the brokerage I paid during the month.. also this came without any intentional step from me, just as I traded on Swf before.. Except 'Superhero' I tried the other 3 in your list and with a hand in my heart I can say am inclined towards gomarkets for features and user experience. Cheers