CTY (OG SYW) bonus $50 for Sep/Oct/Nov spend finally posts

The timing appears to be first statement date after promo end date (so first statement after 11/30).

My statement date is usually the 20th, but issued on the 19th due to the weekend, and the credit posted today, backdated to 12/20. I noticed an unexplained $50 decrease in the balance yesterday and checked again this morning.