FWIW there are apparently two promotions out there that I hadn't heard of before. I presume they are new, although there is a strange 10/04/12 start date listed. 200 Bonus Points on your next NER Business Class trip and 200 Bonus Points on your next Amtrak.com booking is the promise. Both promotions last through 12/31/16. I just signed up...
An update: now the AGR website is saying that I've already been credited for the 200 points on the next Amtrak.com booking-for a trip booked on 4/5/15 when I registered on 6/12/16. Methinks there is some funky programming behind that promotion. I've never taken a BC trip on the NER (deliberately, anyway), so I guess that's why there is "no activity" there. Very strange...