I've tried 20x in incognito mode for this card and the gold card, and neither offer has shown up. (doctorofcredit.com)
It's Chrome, squeezed into mobile, with a unified search / address bar omnibox, Incognito mode for private browsing, and smartphone - friendly features such as voice search. (tomsguide.com)
The public offer for American Express Platinum card is 40,000 but using the below link in incognito mode on several browsers you should see the 100K offer after sending 3K in three months. (aroundtheworldineightydollars.com)