Facebook is now a mobile advertising company, and not a social network. Sure, you’ve heard this before, but it’s a theme worth repeating. That’s especially true in light of Facebook’s rumored upcoming $1 billion acquisition of Israel-based mapping and navigation company Waze, notes tech journalist (and Waze superfan) Hillel Fuld. Without this lens, Facebook’s acquisition…Facebook is no longer a social network, says Quartz writer Christopher Mims, it’s a mobile advertising network – the $1B acquisition of social mapping company Waze proves it. Do you agree? Tell us what you think in the comments.