In this session, we will explore, analyze, and compare various existing models of incentivizing open source developers and the effectiveness of these models in promoting sustained contributions. We will cover different types of incentive programs such as:

1. Project-Based Internships: Programs like Google Summer of Code (GSoC), Open Source Promotion Plan (OSPP), and Outreachy.
2. Bounty Models: Platforms like IssueHunt and IssueBounty.
3. Direct Funding Models: Initiatives like GitHub Sponsors and Open Collective.

Based on this foundation, this session will introduce a series of validated practices from various open source projects, corporate environments, and academic communities. These practices leverage an algorithm that precisely measures developer contributions within the community through collaborative behaviors. The contributions are quantified and scored, and the results are used to reward developers, thereby promoting better open source collaboration and community engagement. We call this measurement methodology Openrank.