Is there a way to get Economics/$ from barrels and loot boxes?  I have a Arena server and loot is not used.  So I was thinking it would be legit if the players could pass a Parkor I have and get $ from the loot boxes at the end.

Economics money can be given for anything, but that would be a separate plugin as this is just the API for plugins to use and basic commands.

what would the plugin be called?  I don't mind paying if it's a paid plugin.

I'm saying one would likely have to be made if not already existing. Maybe Rust Rewards? You can see plugins using this one from the plugin page.