Pinned straw:
I agree it allows Selfwealth to earn more interest on money held in peoples SelfWealth cash trading account
I do note however there's been some fairly vocal backlash online (e.g. on Whirlpool's SelfWealth thread) about this - people complaining the change wasn't detailed in any email communications beforehand, etc - and calls to change brokers
I think the first you'd even know about it is if you'd clicked the email link before the cutover and accepted the conditions there you got asked the additional question re dividends being paid to the SelfWealth account (and you specifically had to tick No to stop this happening). If you just ignored the email and did nothing then I believe when you logged into SelfWealth after the changeover you were just asked to accept to keep your account (no question re the dividend change - and thus SelfWealth just auto changed everyones settings at the registries)