Part of the motivation for putting 'like' buttons all over the web is to gather more granular behavioural data on users, which is eventually going to enable muc

Part of the motivation for putting 'like' buttons all over the web is to gather more granular behavioural data on users, which is eventually going to enable much better targeted ads. They aren't stupid. That said, I'm still mystified by the low quality/relevance of the current ads given what they already ought to know about me.