I hope that people without computer skills can also crack this puzzle.
Based on my observation 1follow and 1FLAME is a signature prefix found only in a Bitcoin address and is also from vanity address correct me if I'm wrong. To be honest I don't have an idea on this since I am not a computer expert and don't even have a computer unit but I just give it a try because 4.87 BTC is not a joke it is worth millions of local fiat money here in my country.