Bank of America cards: spend $15×2 at AT&T Wireless, get $75 back (YMMV)

Earn $75 cash back when you make two transactions with AT&T wireless using your eligible card associated with this offer.
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 $75 cash back is earned within 30 days after making your second transaction.
Offer expires 9/30/2017. I saw this offer on my credit card.
http://att.com/wireless