I'm still curious: does this "wallet" somehow link to an account on a website instead of a private key?
Apparently so, here's a quote from the reddit OP:
A QR code with a key to access the account. When you get in there it says there is .62 BTC which can be withdrawn. I didn’t go further into withdrawing to see what they ask, but the account 1LM.. has only ever had .15 BTC in it on blockchain records, and they have only ever deposited from accounts that have been flagged as fraudulent or scams. Nothing seemed to flag malware/ransomware on site but I am guessing the details provided on the withdraw page are what the scam is, not malicious software. Anyone heard of “Printkey Wallet” before? That’s where the QR scans to.
I scanned the initially concealed QR code on my phone, entered the also concealed code and was presented with a web page with info pertaining to a btc balance of 0.6104...ish.