I think we should all take this as a learning experience and let it go. If the project was legit we probably would have all made a lot of money, but seeing that we most likely were scammed we need to just accept our losses and spend our energy on more useful things. Don't let scammers steal any more of your time.
I like that you frame this as a financial loss but I really see scams like this more as a personal insult and and insult to the community . Governments are getting more interested in regulation - and a little bit of investigation here could give them an easy win. It might not take a lot of our time to 'steal' quite a bit of his.