Price per tweet. According to an upcoming article in New York, celebrities are paid big bucks to endorse products in 140 characters or less. These endorsements are coordinated by companies like Ad.ly, which is “a social-media advertorial clearinghouse”. Here is a look at the sliding pay scale:

Charlie Sheen (6.5M followers) - $50,000**
Kim Kardashian (12.8M followers) - $10,000
Snoop Dogg (6.3M followers) - $8,000
Paula Abdul (2.2M followers) - $5,000
Whitney Port (800K followers) - $2,500 

**Charlie Sheen is an outlier (for obvious reasons). “Sheen’s tweet for Internships.com generated 95,333 clicks in the first hour and 450,000 clicks in 48 hours, created a worldwide trending topic out of #tigerbloodintern, attracted 82,148 internship applications from 181 countries, and added 1 million additional visits to Internships.com.”