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Is it fair for the opponent to have that information?I'm parsing "fair" in the form of: imagine two societies, one where such information is private the other where it's public. Who outperforms?
Would the number of start-ups which cave because an incumbent snipes their marketing outweigh the number who could piggyback on an incumbent's revealed slicing? (The latter, by marketing to the same customers better or noticing who is being left out.) Will consumers see more advertising or less? If more, will they respond to the deluge by defaulting to the incumbent or trying new options more frequently?
I don't know. But we have an opportunity to find out. If this drives innovation, I'd say a case is to be made to open up these data across advertising platforms. Who knows. Maybe it's the tool to pry apart Facebook and Google's stranglehold.