Not really. That is exactly what the scammers want, for people to just give up their lost funds and walk away. Instead, they should do whatever they need to in their local jurisdiction to report this fraudulent scam. At least that way there's a chance the criminals will eventually be held to account for their theft.

That the website is still up will serve to show it is still attempting to defraud people. Also, that the website is still running means there'll be a live electronic trail back to whomever is currently responsible for it.

So the longer it remains, even under its current mode of diminishing-payouts ponzi-script operation, the more time an investigation has to probe its operation and track down the guilty.