It will be interesting to see/read about the wif500 and if they solve it.
I think it's just a clever scam.
The author claims that the photo is from a burnt diary in 2017, but the Ethereum address in the same photo was used in 2021, and just one day.
Why write this address and key in a diary if there was no balance on it at the time?
And even more so to use it after so many years..
0x428d88b326748ebd55c4a7f89fd3bc08378dc0d2