The best stories across the web on media and technology, curated by Leandro Oliva.

1. In a digital age, weighing a financial paper’s worth (NYT)

2. Instagram turns evil, and it’s all our fault (RW)

3. 5 ways journalists are using Pinterest (Poynter)

4. Yahoo teams up with NBC Sports to share online and broadcast sports news and coverage  (TNW)

5. The secrets of the internet’s most beloved viral marketer (BuzzFeed)