Pulling out the relevant part as a quote for other readers:
On average, it took about 25 hours to organize and run a campaign (20 hours by organizers and 5 hours by HIP).
The events generated an average of 786 USD per hour of counterfactual donations to effective charities.
This makes fundraising campaigns a very cost effective means of counterfactual impact; as a comparison, direct work that generates 1,000,000 USD of impact equivalent per year equates to around 500 USD per hour.
Thanks Jack, great to see this!
Pulling out the relevant part as a quote for other readers: