I'm pretty sure MA will add an option to remove that.
We are already inside the game, that banner was more appropriate to publish it on their official website.
I see that banner as something as annoying as dead mobs lying around. MA eventually trimmed it back to the point than now is almost as it was before, but also introduced the loot pill.
Maybe MA wants to push something for a cost before modifying the UI interface to be less intrusive
I hope that decision maker is not stupid enough to make this annoying changes on purpose and add removal option to premium accounts (when they come). This would be suicide for MA.