Tuseday I submitted by email my request for shareholder credit at 2:29 PM. At exactly 8 hours later, 10:29 PM I received an email with an updated Booking Confirmation attached showing the Shareholder OBC. They are getting faster in the processing time.
It might be because I put on the subject line "Shareholder Benefit Request - Sailing date: May 'X', 2023"
I also put all the requested information in the body of the email along with the name of the attached pdf file that had the proof of share ownership. I minimized the number of files that the person processing the request needed to open.