advertisements at a fixed price. Platforms that sell advertisements are then often able to
offer content to users without a separate charge.
The second approach to revenue generation is to sell subscriptions to users who want
to access the content. For example, AngiesList charges an annual membership fee to users.
While this approach can eliminate some of the challenges of relying mainly on advertise-
ments, it can also restrict the number of contributions (since fewer people will view the
content) and ultimately the reach of the platform.
The third main approach to revenue generation is to sell analytics and data. For exam-
ple, Facebook can presumably predict fashion trends across the country better than most
other organizations can, by studying ...