Reviewing many of those "in-build" auto-buy features on exchanges, I can tell you that they have usually a pretty high fee. For me as a cost-conscious investor, I won't pay more than a 0,5% fee per trade.
So how does "taking advantage of lower trading fees" work? Just need explanation from user side, will it have extra task to support it?
Afaik, the trading fees for each platform are static and there will be no changes except to increase the level of verification, or suggest users to alternative payment methods which of course not all users have that.