I got an Amex BCP & Simply Cash when I heard about the Amex & Costco split. Plus BGR & PRG.
I still have the Costco card and am waiting till the end to see what thy offer me as a replacement, thought they may say I've done pretty good on my own

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I have a BCE I may give up for a SPG or will wait until March for the business version of SPG.
I'd wait to see what Amex does with the Costco cards, they may allow a PC currently not available. We'll see.