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If you want a quick, easy and free way to earn bonus Hilton HHonors points, check out this limited-time promotion. If you’re a Hilton HHonors Amex cardholder, you may be eligible to earn at least 10,000 bonus Hilton HHonors points by simply adding an authorized user to your account. The best part is that the authorized user doesn’t even have to make a purchase.
Source: thepointsguy.com