Because then you won’t mistakenly use a card not linked with Eat Around Town when dining out and miss out on rewards.
Members are encouraged to keep more than one credit and/or debit card linked and up-to-date in their Eat Around Town by Marriott BonvoyTM Account Center. You can earn Marriott Bonvoy points through any credit card you register and use at Eat Around Town participating restaurants. Members with more cards registered tend to earn more Marriott Bonvoy points.
Make a practice of updating your card information in your Eat Around Town Account Center any time a card issuer sends you a newly numbered credit or debit card.
If the card number remains the same, but the expiration date or security code changes, that’s no problem. We never ask our members to provide this information.