**What are the key factors that determine the success of a crowdfunding campaign on platforms like Kickstarter or Indiegogo, and how do they differ across various types of projects (e.g., technology, arts, community initiatives)?

**What are the key factors that determine the success of a crowdfunding campaign on platforms like Kickstarter or Indiegogo, and how do they differ across various types of projects (e.g., technology, arts, community initiatives)?