For more than ten years, eBay's (EBAY) PayPal has made a fortune by having a singular focus on making it easier for people to send and receive money online. In fact, it is now grown into a global platform, which can transact in 24 currencies across 190 markets across the world.
But the payments market is undergoing another trend; that is, becoming an integral part of social networks. So this week, PayPal announced a deal to provide payment services to Facebook's massive user base, which now stands at 400 million.
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