AFAIK Google only has access to the public information that it can gather by scraping those websites (which isn't an easy feat at all, given the frequency of updates) or using the public APIs, that only give you a limited amount of information.
Until last Summer, Twitter had a contract with Google to give the latter its firehose stream, with all its tweets in real time. AFAIK, it was Twitter that decided not to renew that contract, evidently because they thought they could monetize that information better without Google. But now, apparently, they want their cake and eat it too...
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AFAIK Google only has access to the public information that it can gather by scraping those websites (which isn't an easy feat at all, given the frequency of updates) or using the public APIs, that only give you a limited amount of information.
Until last Summer, Twitter had a contract with Google to give the latter its firehose stream, with all its tweets in real time. AFAIK, it was Twitter that decided not to renew that contract, evidently because they thought they could monetize that information better without Google. But now, apparently, they want their cake and eat it too...