That's assuming the site lets 10K+ users sign up and pay with crypto, or you have the time to track down and signup for 10K prepaid burner cards. Then, after allo that, you'd have to hope that the site never detects the vote manipulation, since you'd have an account that's getting tons of upvotes from a specific set of users.
Really.. I think this is the worst idea for laundering money I've ever heard of. You'd be better off walking into a casino and putting it all on blackjack until you win a big hand, then reporting the winnings.