I don't know what he means here, but one possible way to brute force would be to iterate the username and not the password. It depends on what you're trying to

I don't know what he means here, but one possible way to brute force would be to iterate the username and not the password. It depends on what you're trying to do, but if you just want accounts you pick the top X number of passwords used then get a list of usernames and a healthy collection of proxies. As long as your list of usernames and proxies are long enough you should be able to brute force your way into a lot of accounts.