Finding your One Metric That Matters
leananalyticsbook.com
AUGUST 19, 2012
Reddit probably has a very high percentage of users who log in: it’s required to upvote posts, and the login process doesn’t demand an email confirmation look, so anonymous accounts are permitted. Someone clicks on a banner, pay-per-click ad, or affiliate link. Viral coefficient (how well your users become your marketers.).
58 
Let's personalize your content