In order to make this achievement fair to users who already purchased a Black Rook membership, the bonus code rules have been slightly changed.
Since today, a bonus can be applied only if a Brain Rook or higher membership level is purchased. Otherwise it would be possible to get a Black Rook for the price of 7 Brain Knight membership which is, actually, very low amount.
Of course, if someone got a bonus for a Brain Knight order in the past, these achievements will not be deleted.
(hide) If you need to find an older message from the selected user, click on his Profile and use the "show this user messages" link at the page top. (konec) (show all tips)