I think it's an interesting sector. The reason HN probably doesn't care is because a lot of us fall under the category of "tech hipsters." Many tech hipsters hate advertising and by extension anything that enables publishers to show them ads (e.g., "I use noscript so I don't have to see any of those ads." and "I use adblock every1 uses adblock stopid").

Targeted advertising tech seems to be the big winner when it comes to being acquired. There have been several extremely high payouts in recent years for companies similar to this one. I'm surprised there aren't more people working to that end. (Maybe there are and you just don't hear about the swathes of companies that don't get acquired.)