Google Wallet was, at one point, the hottest thing in mobile payment technology. You could pay for things using NFC, at least in theory. Poor support left it dormant, but the recent presence of Apple Pay is bringing it back to the mindset of users. Riding Apple Pay’s coattails, Google wants people to use Wallet; so much so, they’re paying you to find them new users. If you send a new user money via Google Wallet, you’ll get $5 in return.