(I'm not here to promote YNAB, I promise I'm just a happy user and not affiliated).
I use my AMEX for 90% of all spending. No issues importing transactions to YNAB. Sometimes there is a 1-2 delay, but they do import.
I use my AMEX for 90% of all spending. No issues importing transactions to YNAB. Sometimes there is a 1-2 delay, but they do import.