The Five API Monetization Models - Rob Zazueta, RESTFest 2016 Developer Experience: Appealing to the 3 Virtues of Great Programmers Building Adaptable APIs with NARWHL (API Days Paris) The 5 API Monetization Models and How to Measure Their Success Taming the RESTed NARWHL: Striking the Balance Between Usability and Zealotry in REST. 
