This feature (enabled for paying members only) masks your last action which is displayed next to your name when you are online. It means that if you activate the cloak mode on the Settings page, nobody can see which BrainKing page you are currently viewing.
(hide) If you want to save on bandwidth you can reduce the amount of information that shows up in your pages in the Settings. Try changing the number of games in the main page and the number of messages per page. (pauloaguia) (show all tips)