Just interested to know, why or how did you get even those 10,000 wallets? LOL
Maybe he has a very successful phishing site.
If he know how to create/deploy phishing site, i'm sure he could write script and extract Bitcoin using ready to use Python library.
I hope you didn't pay for those. If you did, then you were probably scammed.
Or that. I can't think of any legit reason why someone would have that many different
used seed phrases.
No way he bought 10K wallet. I won't provide any link, but single fake wallet usually cost $10 to $999.