No, what you do is file a complaint explaining that you have lost money to a website which fraudulently misrepresented itself and claimed to be providing a legitimate service which you have since discovered was nothing but a ponzi-based scam.
That will be sufficient for the complaint to be sent to a department which handles financial fraud. As has been said, there are enough cases of these ponzi schemes now being pursued by law enforcement to warrant the effort of making a complain. Particularly so in this case as the website is still live, which suggests there is potential for more people to be defrauded, adding impetus to any investigation.
You might want to add that if someone wants to report or file a complain and it will be actively prosecuted by law enforcement that whatever withdraw they ever made will be eligible for clawback, even more so if they knew about the project being a scam. So if you dropped 5
BTC in and got 1 out, you'll first need to pay back that 1 btc to put in the pile from where your 5
BTC will be paid out.
A convenient law that somehow never gets mentioned by the ones that say they should file something somewhere

I'm sorry, but I'm not following you. Are you saying that there's a law in my jurisdiction that says my local police force won't regard fraud as fraud unless I pay scrypt.cc anything they may have paid me? I'm sure that can't be right, so could you clarify? Ideally, could you point to the relevant legislation/code (doesn't have to be in my jurisdiction, if you point me in the right direction I can probably find locally appropriate legislation).