Originally Posted by
Zorak
AMEX has been known to send offers without the once per lifetime bonus language. See eg recent discussion in the last page or two of this thread:
Ongoing offers for Delta American Express cards
Even with the lifetime language, I've seen posts in the AMEX forum suggesting they only keep ~7 years' worth of data.
Regardless, I likely would have gotten a pop up warning stating that I am not eligible for the welcome bonus if Amex wasn't going to honor the 60k miles.