Whats with the 18 month language?
You have to wait 18 months if you want to get
bonus on
same card. Ie, if you got premier bonus once you need to wait 18 months to reapply to get bonus. You can apply for card earlier, but you won't be eligible for bonus.
Eight day rule is that citi won't
approve you for
any card if you were approved for any card in last 8 days.