Citi has sent out a mailer with news that they are automatically changing the Dividend card to a Custom Cash card unless the customer opts out. Probably the mailer is being sent to only select customers; we don’t know how widely it was sent out.
In any case, if you did get notice and prefer the Dividend card, you can opt out by tomorrow, September 9th. The product change will occur on September 19th.
Hat tip to MEAB