One week: 500 mile minimums on US. The Next week: no 500 mile minimum
PMUA there was no 500 mile minimum on US for the last couple of years, PMCO there was. Post merger, website doesn't mention it - which would indicate that the 500 mile min. Isn't supposed to exist on US.
I believe there have been other reports post-merger of those being issued 500. My guess is that since they are on the old CO system, programming was still set for the minimum, and that they got around to changing it to actual miles flown. I don't have experience with that post-merger - my 3 US flights post 3/3 have either been award or >509 miles.