I just got this email from Amex, so apparently Olives is back on the list for the $100 credit at Bellagio.
"It is my pleasure to provide you with the following details regarding your dining reservation to Fix. I hope you have a wonderful evening at this popular restaurant and a great time in Vegas. I have checked and the locations the $100 credit can be used at are Fix, Olives, Jasmin, Michael Mina, The Buffet, Caffe Belligo and Sensi."