I got the same e-mail. It also said:
"As an elite status member, can I stand by for a different flight on the same day?
Yes, AAdvantage Executive Platinum members continue to have the option to stand by for a different flight on the same day of travel at no charge. This benefit also applies to passengers traveling with you in the same reservation."
Since it doesn't say domestic only, I guess this means international same-day standby is AA policy.