Someone tried to solve a big schlep of event organizing.
Through this app, you:
Pledge money when signing up to an event
Lose it if you don't attend
Get it back if you attend + a share of the money from all the no-shows
For some reason it uses crypto as the currency. I'm also not sure about the third clause, which seems to incentivise you to want others to no-show to get their deposits.
Anyway, I've heard people wanting something like this to exist and might try it myself at some future event I'll organize.
What it says on the tin.