I got a similar response, but it's vague enough that if they were to change the policy (and give notification), even soon, their email would technically still ring true
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Thank you for writing in.
Yes, you will continue to earn 6 Hilton HHonors bonus points for every dollar of eligible purchases:
-At U.S. stand-alone supermarkets
-At select major drugstores
-On gasoline at U.S. stand-alone gas stations
-For U.S. wireless and home telephone, cable TV, and satellite TV services
However, we continually evaluate Card benefits to ensure that the benefits associated with our Card products appeal to our Cardmembers. We will notify you, should we make any additions to the benefits associated with your Card.
I hope I was able to address your concern.
If we can be of any other assistance, please contact us.
Sincerely,
Email Servicing Team
American Express Interactive Services