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Overview
Cards
Credits
Spending
Rewards Programs

Offers
Dining
Hotels
Airports
Recs
Miscellaneous

News
Pro
Help

Overview
Cards
Credits
Spending
Rewards Programs

Offers
Dining
Hotels
Airports
Recs
Miscellaneous

News
Pro
Help

Wallet Search Tools News Profile

Wallet Search Tools News Profile

Sine Wave Cafe

Card-linked offers · 1 active

In store

5% return

5% Back

Reported on 4 cards

Citi Double Cash® Card
Citi Strata Elite℠ Card
Citi Strata Premier® Card
Citi® / AAdvantage® Executive World Elite Mastercard®

First seen: Oct 29, 2026
Last seen: Oct 29, 2026
Expires: Jan 24, 2027

How card-linked offers work

Review offer details
Check the reward, eligible cards, purchase method, and expiry.
Add the offer
Activate it on an eligible card or account.
Shop with that card
Pay with that card before the offer expires.
Receive the reward
Your reward posts after you meet the offer terms.

Activate Sine Wave Cafe offers faster

The nextcard Chrome extension can find available card-linked offers while you browse supported issuers.

Install the extension in Chrome on your computer.

Email me the desktop link

Sign in to send the link to your account email.

How card-linked offers work

Review offer details
Check the reward, eligible cards, purchase method, and expiry.
Add the offer
Activate it on an eligible card or account.
Shop with that card
Pay with that card before the offer expires.
Receive the reward
Your reward posts after you meet the offer terms.

Activate Sine Wave Cafe offers faster

The nextcard Chrome extension can find available card-linked offers while you browse supported issuers.

Install the extension in Chrome on your computer.

Email me the desktop link

Sign in to send the link to your account email.

© 2026 nextcard. All rights reserved.

Privacy Policy Terms of Use

Advertiser Disclosure: nextcard may receive compensation through our partnership with advertisers when you click on links to offers on this page. Terms apply to the offers listed on this page. nextcard may receive compensation when you click on links to offers on this page. Opinions expressed here are the author's alone, not those of any bank, credit card issuer, airlines or hotel chain.

Sine Wave Cafe: 5% back with Citi