It is already part of the game, although I don't believe it is in the UI.
Our config page will be updated so that the delegation can be set by you when you enable and disable the bot.
It requires active key, and so we can't 'tax' you without your permission.
But to what username should we set the rewards delegation?
Right now this isn’t live - the whitepaper is announcing the intentioned - the requirements aren’t live yet. I think within a week is the goal. Details will be announced when it’s live.