New data point:
Called the number on the back of the card and had the frontdesk rep. put me
through retention department. For both the Amex and Visa signature cards,
the rep from retention dept offered a $95 statement credit when purchasing $
95 or more in total within the next billing cycles plus the similar offer
mentioned regularly: Within a single billing cycle Earn an extra 1K miles
when make $1K purchases or more and it is good for the next 16 billing
cycles. I took it.