They ran this same promotion for Jan Feb March which I signed up for and I received the bonus points. The maximum points you can get are 10,000. When I hit the 10,000 which was mid February my account was credited immediately. I also signed up for the April May June promotion but I have not hit 10,000 yet. Hopefully it will be soon.
Also some other people posted on this board that their promotion was only 2x the amount spent over $450.00 so I think the promotions are all different based on your spending habits.