FYI Hack Club helps fiscally sponsor organizations that do not have the capacity to apply for nonprofit status (https://hackclub.com/fiscal-sponsorship/). The 7% income covers dev fees for lawyers, engineers and a bunch of other stuff to help it kept running.
Hack Club was on a grandfathered free nonprofit plan, but switched to a 5k/year on earlier this year under a special deal with Slack. Now the price is increased to 50k one time, and then 200k a year