The money is lost even if it is a ponzi scheme. Their silence speaks volumes. If it were anyone else running a legit operation they would be freaking out about these share prices. They'll let the price drop to 0 and not care when a corporation is supposed to legally profit for shareholders? It doesn't make sense.
You don't know what their scam is in the end. It could just as well be that they
have working hardware, but want all the profit for themselves. So they create uncertainty with all their bullshit, suspiciously show very little hashing etc and drive the price down close to zero, then buy up all the shares. And then suddenly, when everyone has completely lost trust and they have 99+% of the shares, they suddenly
do start to openly mine and can say "well, we told you all along, you just didn't have trust in us", thus saving themselves from the legal threats. The stock price would shoot up again dramatically and they would have earned millions in share appreciation already, let alone the mining income.
I don't really think that is the scam they're doing, but it could just as well be. All that I'm practically sure of is that they
are doing a scam, whatever the exact scheme might be.
Just get out of this mess and buy yourself some safe and reliable ASICMINER.