because they will eventually have a superset copy of all this data, which these companies are building a business model on. eg. Facebook API access is for Facebook apps that use Facebook credits. Twitter API access is expensive (Gnip charge $10k+ a month plus just for a slice).
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because they will eventually have a superset copy of all this data, which these companies are building a business model on. eg. Facebook API access is for Facebook apps that use Facebook credits. Twitter API access is expensive (Gnip charge $10k+ a month plus just for a slice).