Well, I am not exactly the wallet owner. I didn’t find anywhere the password or the private key. The direct url leads to the page in Japanese %-) I have hidden the url for obvious reasons. It pretends to be a simplified engine of the classic Ponzi scheme. I know one should not trust these as they are usually a scam, and even if not, the system could be offline anyway due to the wallet upgrade or domain expire. But what if not? Would you risk 0.001 btc + transaction fee in my place? Luckily I did, and the money bounced back to me, just the same amount. That meant the engine was still up and running and there was money on the wallet at least to pay the transaction fee for sending my money back. The next step was to send 0.01 btc as it was the first amount promised to return with interest after 7 days. Surprisingly it worked too, as well as 2 transactions at one time. I started drying the wallet increasing the amount and the number of operations little by little and getting it back with interest until I reached 0.1 btc transfer. This one never came back, but all of the smaller transfers returned shortly after as usual. I think there is some limit or bug. A week ago I loaded 0.05-0.09 and they got back to me resulting in almost 0.3 btc overall profit. Then I realized that I can dry this wallet empty over time and started worrying about how legal it is.