> The same reason Gmail can't work with end-to-end encryption--they want to advertise at you based on message content. Facebook can do fine without that inform

> The same reason Gmail can't work with end-to-end encryption--they want to advertise at you based on message content. Facebook can do fine without that information: they have more information than they can develop ad services for at the moment; they could use a lot more engineers though. The goodwill from the dev community in allowing appropriate targeting is far more important to them. Two good examples being location and language: you can advertise for people in a certain place or who speak a certain language, but there are many unserved combinations, like tourists, language minorities and commuters. In my case, I’d love to see ads on learning Swedish: Facebook can see some of my friends speak it, and this is new. Source: worked for Fb, but in Engagement, not the Ads team; offered a lot of targeting suggestions, but most where “presumably not the biggest opportunities (they) could work on”. At Facebook’s scale, we are talking really big numbers.