Just saw this offer in my Samsung Pay app on my phone. You can also use it online at stores like Newegg and Walmart (Free store pickup) if you link your Visa card through Visa Checkout. I just made several individual purchases at Walmart to pick up some extra points. Not sure if this is targeted so YMMV?
"For a limited time only, earn 4x Samsung Rewards points with every qualifying purchased in Samsung Pay."
Who is eligible?: Samsung Rewards program enrolled users.
Dates: Ends June 29, 2018
How to participate: Simply use Samsung Pay by June 29, 2018 to earn 4x Samsung Rewards points. See the Samsung Rewards Terms and Conditions for program information.