Pencils Down: Audience Expansion Edition

Plenty happens daily. How to keep it all straight? Time to test your memory!

What has Quora done to expand its audience?

How did Condé Nast nearly lose $8 million?How does Bill de Blasio intend to catch the city’s worst landlords?

Where has Kevin Rose landed after Digg?

How many people patronize Yelp each month?