【2021.7 更新 2】 DDG 聯絡了客服，得到確認，這裏的 previous 確實是指之前的普通版 Platinum 卡，而不是其他類型的 Platinum 卡。
‘previous’ means previous versions of the same Platinum Card. The co-branded Platinum cards are considered different products. So if you aren’t flagged for other criteria (e.g. gaming behavior) , you would still be eligible for the welcome bonus.”
【2021.7 更新】根據 DOC 其中一則留言的 data point，有人已經拿過普通版 Platinum 的獎賞，在條款更改之後，又申請了 Schwab 版的 platinum，並順利拿到獎賞。看來這條新加的條款只是限制同一版本的白金卡。
AMEX Platinum 系列卡今天有較大的改動，提高了年費，也新增了多項福利。而白金卡的申請條款中出現了這樣一句話
Welcome offer not available to applicants who have or have had this Card or previous versions of the Platinum Card. We may also consider the number of American Express Cards you have opened and closed as well as other factors in making a decision on your welcome offer eligibility.
有些人理解為，如果之前拿過白金卡，或其他類型的白金卡（例如 Schwab、Morgan 等），就拿不到這張新白金卡的開卡獎賞。就我個人而言，我覺得如果它真的要禁止，應該像 Citi ThankYou 系列、Chase Marriott 卡那樣，把有衝突的卡名列出來；現在這句 previous versions 太模糊了。
也許 AMEX 只是禁止持有過原版 platinum 的人再申請新 platinum，持有過 Schwab 的人再申請 Schwab 而已。實際上 AMEX 會如何操作，還是要看申請人最終能否拿到獎賞才能判斷。目測這些卡的開卡獎賞暫時不會變，大家不妨先等等真實的 dp 再看。
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Citi ThankYou 系列的限制
Bonus ThankYou® Points are not available if you received a new cardmember bonus for Citi Rewards+®, Citi ThankYou® Preferred, Citi ThankYou® Premier/Citi Premier® or Citi Prestige®, or if you have closed any of these accounts, in the past 24 months.
Marriott 卡限制
Eligibility for this product: The product is not available to either: (1) current cardmembers of the Marriott Bonvoy™ Premier credit card (also known as Marriott Rewards® Premier) , Marriott Bonvoy Boundless™ credit card (also known as Marriott Rewards® Premier Plus) , Marriott Bonvoy Bold™ credit card, or(2) previous cardmembers of the Marriott Bonvoy™ Premier credit card (also known as Marriott Rewards® Premier) , Marriott Bonvoy Boundless™ credit card (also known as Marriott Rewards® Premier Plus) , or Marriott Bonvoy Bold™ credit card, who received a new cardmember bonus within the last 24 months.
