got this response:
Mr David, this offer is for targeted Cardmembers only. I have reviewed your account and was not able to locate this offer on your account. If you received this offer by email, then these bonus points should update to your program account within 6 to 8 weeks after the promotion end date of 05/31/2011. If you were not solicited for this promotion, no bonus points will be issued to your program account.
Have a great day!
Sincerely, Sonya Robinson Email Servicing Team American Express Interactive Services