I had this two years ago on my Samsung S5. It was called ISIS Wallet, and then after the rise of the same-named terror group, was renamed Softcard. Amex had a deal where they'd credit me back $1 per swipe (minimum $1 purchase), up to 50 times per month. Those were good times, if you could figure out where the magic tapping sweet spot was on your phone.
Then, Apple Pay comes out, and it suddenly becomes cool. Except Rite Aid, CVS, etc. changed their machines to no longer accept any of the other payment systems just to block Apple Pay adoption because they planned to launch their own system this year under an alliance led by Walmart (which is still non-existent at this point).
Then, Google bought Softcard, and just killed the service. I guess they just have cash to burn. And now Samsung re-launches the service as Samsung Pay. I feel like I'm back where I was two years ago, except I'm no longer paid to swipe, and there are even less places where I can tap to pay. Pardon me, but *yawn*.