Looks like American Express has increased the bonus spend for the Gold card to $6k and started to exclude the bonus if you've had any of the flavors of the personal Platinum card:
You may not be eligible to receive a welcome offer if you have or have had this Card, the Premier Rewards Gold Card, the Platinum CardŽ, the Platinum CardŽ from American Express Exclusively for Charles Schwab, the Platinum CardŽ from American Express Exclusively for Morgan Stanley or previous versions of these Cards. You also may not be eligible to receive a welcome offer based on various factors, such as your history with credit card balance transfers, your history as an American Express Card Member, the number of credit cards that you have opened and closed and other factors. If you are not eligible for a welcome offer, we will notify you prior to processing your application so you have the option to withdraw your application.
Link to terms:
https://www.americanexpress.com/us/c...0/#offer-terms