I saw an offer on whistleout. com , offer detail :
Online offer: Get a $50 Visa Reward Card when you activate a new $50+ prepaid line on monthly plan. Will receive the gift card after 3 monthly service payments within 90 days of activation. Must activate it before 4/11/19. Redeem reward Card at www.att.com/claimyourcard.
I received an email last month saying that I completed my three months and I still haven’t received my text messages for both lines. But I did receive a text about my bill needs to be paid on May 3rd. But no reward text messages.