Update: I just had occasion to call the diamond desk today, and while on the call, I asked the question to the rep on the phone to get his opinion on the subject. He informed me that the information the other rep gave me (only one special request per year) is patently incorrect. He said that special requests were part of the perks of being a diamond member and that they are happy to process 5-10-15 or as many special requests per year as a member needs. I told him I was glad to hear that. Just thought I'd update you all on what I found out.