There's more to compel a person to go to Facebook than there is to Reddit. Many Reddit threads are more snark than real conversation. <shrug>
Nope they don't and Reddit hasn't really been heavily focused on ads. But they do have a large user base, very focused topics etc etc.
So setting up say a /r/games_of_thrones page, if I was HBO could be very lucrative or marketing my products to the subscribers.
> There's more to compel a person to go to Facebook than there is to Reddit.
Reddit has somewhere north of 200 million users, that is a large audience to ignore. So yes FB maybe king but Reddit has its place.
A valuation of $10 a user I would stay is quite low.