Also, what is the network you mention? Is this official WhatsApp payment system or some group of stores using WhatsApp as ledger?
Network probably wasn't the most clear word to use. I meant any one of the physical stores in home country that work with the agent in the resident country. My observation is an agent from a specific area in home country will work with the stores from his area in his home country. He or she collects "real" money in the resident country and the shop owners provide the money/goods in home country. All this happens through regular WhatsApp. Not the new money feature.
Also, I'd like to add the sheer number of people that are on Whatsapp is incredible.
Financial transactions is mostly dominated by Paytm, GPay etc.