Last month, Samsung invited people to try its own mobile payment service (called Samsung Pay) by giving away $30 gift cards to Galaxy S7 or S7 edge owners who used the service before March 31. Now, Samsung is back with a similar promotion, this time involving owners of more handsets.
Between April 15 and May 10, if you live in the US, you can receive a $30 gift card after you complete 3 purchases with Samsung Pay. However, you need to “have already registered for Samsung Pay before the commencement of the Offer Period, but have not yet made a purchase using … – Source
Use Samsung Pay before May 10 to get a $30 gift card (US only)