Pricing models for Crowdsourcing Platforms

How do platforms that host crowdsourcing contests make money? Platforms capture value by taking a cut out of a firm's budget. In particular, I am interested in the role of the fixed fee. Is it better to have a fixed fee and a budget-dependent fee or both? This is also called two-part tariff pricing and …

A definition of “Innovation Contest” and how to offer the right prizes

A definition of what an innovation is.