How sound boxes, small speakers that read out payment confirmations, have become a lucrative revenue stream for Paytm and other digital payment firms in India (Adnan Bhat/Rest of World)

Adnan Bhat / Rest of World:
How sound boxes, small speakers that read out payment confirmations, have become a lucrative revenue stream for Paytm and other digital payment firms in India  —  Vegetable carts, flower shops, mom-and-pop stores: Small speakers that read out digital payment receipts are making fintech companies big money.

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