Apple Card is currently offering many limited-time registration offers, but these offers only help new customers – not existing ones. However, this new offer benefits current Apple Card users.

Until May 18, Apple Card users can earn $100 Daily Cash when they add a joint owner to their account and the new joint owner spends $100 within the first 30 days.

Apple introduced the Apple Card Family a few years ago and seems to want to encourage more people to add joint owners to their Apple Card accounts. With Apple Card Family, you can add joint owners and participants. Joint owners share responsibility for the account, while participants can only have one card and make purchases. You can sign up for the offer here.

When you add a joint owner to your Apple Card, they will also earn the same rewards as you – and after the first $100 in spending, you earn an additional $100 Bonus Daily Cash. Apple Card earns 3% cash back on purchases made at Apple and select partners, 2% cash back on all purchases made with Apple Pay, and 1% cash back on all purchases made with the physical card.

Currently, the Apple Card is issued by Goldman Sachs. Apple has announced that JPMorgan Chase will take over the program in the near future. Significant changes are not expected, but you can get more information here.