Noticed this page on the United site.

https://secure.unitedmileageplus.com...014/terms.html

Points to miles 2014 Terms and Conditions

Registration: To qualify for this offer, members must register for the promotion at https://secure.unitedmileageplus.com...014/index.html between October 28, 2014 and December 05, 2014 ("Promotional Period").

Posting of Promotional Miles: At the conclusion of the promotion, all miles earned by each member from Qualifying Activity and posted to such member's account will be multiplied by 20% to determine the eligible bonus up to a maximum of 25,000 Bonus Miles. Bonus Miles will be credited into the member's account on or before January 31, 2015. No Bonus Miles will be awarded if total Award Miles earned by such member from car rental and hotel points converted during the Promotional Period is less than 5,000.