when you use your Citi Hilton reserve card. This is what the e-mail said that I received today. ENJOY THE SEASON WITH UP TO 6,000 EXTRA BONUS POINTS Earn 2,000 HHonors Bonus Points per stay when you use your Citi® Hilton HHonors™ Reserve card at any hotel or resort within the Hilton Portfolio through February 28, 2015. You can earn up to 6,000 extra HHonors Bonus Points. Remember, you already earn 10 HHonors Bonus Points for every dollar spent on stays within the Hilton Portfolio; with this offer you will receive 2,000 additional Bonus Points per stay. Enroll by February 21, 2015.¹ Of course I enrolled.