I have an AMEX PLAT BUSINESS card. I received an email to "join" KABBAGE, $300 after 5 debit purchases, 1.10% interest for balances up to $100,000. I went through the application process, but was REJECTED

Any idea of why?
PS: I've been with AMEX since 1968.
I got the same email, and I don’t have any Amex Business card (and never did). I assume they can’t see from my credit report that I have a Chase business card?
In any case, I wasn’t planning to apply for it anyway.