Logged in to check my credit card statement and noticed an online offer for 3,000 bonus points for adding a supplementary card online. Had a chat to customer service through live chat who verified the offer.
May be targeted. If the offer isn't available, have a chat with customer service who may be able to honour the offer regardless.
UPDATE
This offer excludes cards that have existing linked supplementary cards.
Looks to be targeted. Can I add a cautionary note……..
DONT click on the link to look at it without completing the application……..otherwise you might find the offer disappears from your account. :(