I rang United Mileage Plus and was told that the 30% bonus miles will be posted by 31 January 2023.
What a ridiculous promotion. They need to let people know, not in the fine print, that the bonus miles may get posted months after the promotion closes. I wouldn't fall for one of these promotions again. I don't have millions of miles to play around with and wait for bonus miles to post!!

Edit: Sorry just read earlier posts on this thread and the issue has already been raised. Glad at least I'm not the only one. What a shocker. It's clearly United's responsibility. Marriott have sent on the points to my mileage plus account.