I have called about 4 times trying to get an incentive to upgrade to platinum (either reduced or no annual fee 1st year or MR bonus) and got rejected every time. You pretty much have to be targeted for those offers. They might offer them depending on how long you've had accounts and how much your spending is on the card. Some get them for spending thousands, and others simply don't use the card awhile and get them. It's weird how it works.
I am still deciding on whether I'm going to upgrade. I fly twice a month for business, so I'd use the lounges. The FHR program and domestic companion tickets are useful also. Alot of the other benefits either come with the gold card or I wouldn't use them anyway.