The new reality is that open data is a competitive advantage. The likely solution then is to stop worrying about protecting information and instead start charging for it, by offering an API. Having a small fee per API call (think Amazon Web Services) is likely to be acceptable, since the cost for any given subscriber of the service is not going to be high. But there is a big opportunity to make money on volume. This is what Amazon is betting on with their Web Services strategy and it is probably a good bet.
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See that post with different algorithms in metabole
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