When you arrive late without a war chest, wire the reward directly into the transaction rails so every payment settles instantly and becomes its own reason to recruit the next user.
Google Pay
Google Pay, launched in India as Tez in September 2017, entered a market where Paytm already held the demonetization tailwind, a 280 million wallet base, and $1.4 billion of fresh SoftBank capital. Tez had none of that head start, so it wired the reward into the payment rails themselves, a scratch card credited straight to your bank account every time you sent money. Within a year it had crossed 750 million transactions at a $30 billion annualized run rate, built not on a bigger war chest but on a loop that turned each transfer into a reason to recruit the next user.
Disruptive Innovation: the bank-settled scratch-card loop that outran Paytm's wallet
The problem. When Tez shipped on September 18, 2017, the payments race in India looked already lost. Demonetization had made Paytm a household verb, and Paytm had grown from 125 million wallet users to 185 million in the three months after the note ban, reaching 280 million by November 2017, funded by a $1.4 billion SoftBank round at an $8 billion valuation. Google arrived a year late to UPI with no wallet, no merchant base, and no reason for a Paytm user to switch. It could not out-spend Paytm and could not out-wait it.
The approach. Instead of building another wallet, Tez turned the reward system into a growth loop wired to UPI itself. Every eligible payment a user sent generated a digital scratch card worth up to ₹1,000, and because Tez ran only on UPI, the cash landed directly in the sender's bank account rather than a closed wallet. A weekly "Lucky Sundays" draw put ₹1 lakh on the table, and a referral paid ₹51 to both the referrer and the new user the moment the newcomer completed a first transaction, up to ₹9,000 per account. The payout triggered on sending money to people, so the fastest way to earn more was to get the people you already paid onto the app.
How it solved it. The loop compounded from a standing start. Within two months Tez was posting the highest UPI transaction volume of any app, ahead of Paytm on rails Paytm had been on longer. One year in, it had crossed 50 million downloads with roughly 16 million monthly active users, 750 million transactions, and a $30 billion annualized run rate. Paytm carried the same demonetization tailwind and far more capital, but its rewards stayed trapped inside its own wallet while Tez paid real, withdrawable money to any bank and made every peer transfer a recruiting event. The variable, bank-settled payout, not the ad budget, was the engine.