Are you sure this is not yourself op? The repo looks really new. I can't imagine scrolling Google pages would lead you there easily. Just do what has been suggested above. It's likely a scam. Even if you assume that guy don't have the hardware to bruteforce those wallets, it's pretty easy to generate thousands of old wallets yourself. If for some reason you're worried about BTC security or something, don't.
So is this a new form of marketing? Very not unique if you ask me because it's clear as day this person wants to scam unsuspecting individuals.
So make it make sense; you have 10,000 Bitcoin wallets yet it's 200 dollars one can use to access it? Is that like the gate fee or something?
So I took a look at your post history and it shows that you are an ardent marketer of new projects that hold no value or significance, what's stopping you from being the creator of this "report you came across on GitHub?".