Checked my account this morning and received a nice surprise. AMEX gave me an auto CLI of $1500, bringing this card's CL from $1000 -> $2500. I opened this card back in mid-April of this year. I have one other AMEX card, the Delta Gold with a CL of $1000 opened Oct. 2017. Always PIF. Never tried for a CLI on the Hilton, tried a few times on the Delta but no love. Nice to see some auto love from AMEX.
FICO scores are: EQ - 658, TU - 680, EX - 673.