So the important question might be - what do you want to do with the "like/+1" type data. And then decide on the appropriate system to codify that and summarise the results.

If someone can't be bothered to trot out even a hackneyed sentence expressing their admiration for or at least interest in a topic, they can't really hold that strong an opinion. Viewed cynically, an online service doesn't want to do anything* with the "like/+1" data, let alone codify or summarise; the value is already delivered along with the clicks, as the rats have a functioning lever to press...

-Dave

* for its users. for the paying customers --the advertisers-- the summarisation is probably both valuable and available.


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