I found this in my Bank of America account. YMMV and amount might differ:
Earn $50 cash back when you make two transactions with AT&T wireless using your eligible card associated with this offer.
Offer expires 9/30/2017. Must make two separate transactions with AT&T on wireless products or services of at least $15.00 on the card associated with this offer by 11/14/2017. Your $50 cash back is earned within 30 days after making your second transaction. See offer details. Taxes, fees, other charges & restrictions may apply. Add'l speed, usage, and other restrictions apply. Offer valid one time only.
This looks similar to previous deals, only it's for $50 CB instead of $75:
This is a potential $20 moneymaker.
---Thanks satellite779 for the template.