Sundays around noon PST. Empirically that's when I've seen things posting. I had two rooms at Park MGM -- one 3-night stay checked out last Sun, and one 8-night stay this past Thurs. They both posted today a a few hours ago.
I think if you don't see things posting by the Sunday ~7-10 days after you check out you'll have to wait until the 30-day mark to request retroactive credit.
Curiously - got the 2x MGM points on the shorter stay but not on the longer stay. But the shorter stay also had the most $$ spend so according to the official program terms -- where "only the room occupied by the Member will count toward this offer" they arbitrarily chose the one that provided me the most point -- which feels reasonable.
Overall, just generally happy that I don't have to follow up with MGM to chase up the points.
Last edited by AllThePants; Aug 28, 2022 at 3:23 pm