My other 2 cards are used more often and have a total limit in excess of $25k, but I was surprised to receive the note from Amex- I made sure to use it on a few purchases throughout the year.
Any thoughts or experiences to share?
the only impact it can have is on utilization, which has no memory.
Try calling them and asking for your limit to be reinstated.
Or go online and request a limit increase. With Amex it’s always a soft pull (no effect on your credit).
Was this a Blue Cash card?
It will have no meaningful* effect on your credit; don't worry about it.
*As others have mentioned there is potentially an effect on your credit utilization ratio, but unless your combined statement balance tends to be over 5k a month a total limit of 25k isn't meaningfully different from a total limit of 21.5k or whatnot.