Twitter Versus Facebook: Why Selling Access Is Better Than Selling Data

Facebook sells access to its user data through advertising, while
Twitter sells its packaged user data directly, letting others build
high-margin analytics services around it. Their different
approaches remind us that from a financial standpoint, selling
access is better than selling data.
Source: FS – Social Media Blogs 1
Twitter Versus Facebook: Why Selling Access Is Better Than Selling Data