Sinclair has reached a deal to acquire 21 regional sports networks (RSNs) from Disney for $10.6 billion, around three months after CNBC claimed the US broadcaster had dropped out of the running. In a case of David versus Goliath, somehow or another Sinclair has managed to beat away bids from Amazon – and its share price is already reaping the benefits. As well as opening doors into the hugely lucrative live sports streaming market, the deal marks a potentially bigger cash cow in the form of live sports gambling, with country-wide legalization across the US hanging in the balance. The wealth of user data Sinclair can leverage through the deal, as well as the technology clout, gives it merit for…