You could easily bruteforce them with random passwords.
You may get one or two hits.
Depends on the game you scrape them from, how high the account is worth.
You could also do this for websites, online games, origin, steam or any other website/client.
But you need a good password list to get some hits
Maybe some captcha services and or captcha/proxy less configs/urls.
Also a good bruteforce programm is ofcourse needed.