What is Prosus, Europe's consumer-internet star, for?

FEW FIRMS struggle with too much success. One is Naspers, a South African media group founded in 1915. In a prescient bid to diversify away from newspapers in 2001 it paid $32m for a large stake in a piddly Chinese startup. Tencent, the startup in question, has since morphed into a gaming and messaging behemoth worth over $670bn. Dealing with the windfall presents unique management headaches. The unexpected upshot of a South African investment in China is a European consumer-internet giant. A ye...