The Pyramid bonus saw a lot of players move up from NL2 and NL5 just for the bonus, and the amount of extra rake it made them was MASSIVE. That's why they extended the bonus for another month, and ran their test on Belgium. Forced me to rethink my BRM since I suddenly no longer had NL2 to fall back on if things went sour.
It's only a matter of time before they make it general, imo...