The Robin Hood Foundation's Endowment Is Zero

The Robin Hood Foundation is a 32-year-old organization focused on ending poverty. Unlike the stock trading app, it was founded by investment professionals to invest in organizations with high potential to alleviate poverty. The foundation has allocated nearly $4 billion to various causes, including education, housing, and health. It raises funds annually, with a unique model where every dollar raised is spent within the next year. The board covers all operational expenses, ensuring maximum impact of donations.

What was the amount raised by the Robin Hood Foundation in the last year mentioned?

How does the funding model of the Robin Hood Foundation differ from other foundations?