Just got this email, I assume it isn't targeted:
Limited Time Exclusive Offer: Get a one-time $5 statement credit applied to your Card ending in xxxxx when you log into the Amex Mobile app between 12/07/14 12/31/14.
Follow these 3 easy steps to download the Amex Mobile app and receive a one-time $5 statement credit:
1 Visit the App Store or Google Play.
2 Download the Amex Mobile app on an iPhone or Android phone.
3 Log into the app between 12/07/14 and 12/31/14 with your user ID and password.
Edit: May be targeted - watch your email
Terms and Conditions
Get a $5 one-time statement credit by logging for the first time into the Amex Mobile app on an iPhone or Android phone between 12/07/14 and 12/31/14. This offer is exclusive to the named recipient of this email from American Express and is not transferable. To be eligible for this offer, you must log in to your American Express online account on the Amex Mobile app on an iPhone or Android phone using your Amex user ID and password associated with the card identified in this email. You will NOT be eligible for this offer if you logged into the Amex Mobile app on an iPhone or Android phone prior to 11/7/2014. You will also NOT receive any statement credit if you log in to the Amex for iPad or the Amex Tablet app during the offer period unless you also log into the Amex Mobile app on an iPhone or Android phone for the first time during that same period. Limit 1 $5 statement credit per Card member. If you qualify for this offer, the one-time $5 statement credit will appear on your billing statement for the card identified in this email within 8 weeks of first logging in to your American Express online account on the Amex Mobile app. Small Business, Corporate and Prepaid cards are not eligible for this offer. Offer also not available for redemption on any device other than iPhone or Android phones. Additional Card Members on your account are not eligible for this offer. American Express reserves the right to modify or revoke this offer at any time.