This presentation analyzed data from 200,000 Causes users to understand user types. Quantitative methods like k-means clustering and decision trees identified 6 personas. Surveys and interviews with 1,466 and 65 users provided qualitative data. The results identified six main user types of Causes: Casual Activist, Self-Assured Millennial, Practical Activist, Ambitious Activist, Organized Retiree, and Tenacious Veteran Activist. Future work will engage users through tailored approaches based on their needs and identify ideal user types.