How do you get combos?

you can't get any hits on social club mate, they upgraded their security and shit
to get combos you need 'Dorks' Sqli or Havij
so you post the dork on google, after that you will get some websites on the results page, copy the link and past it on havij, or sqli, and start scanning for vulnerable targets. after that you may or may not get to the database
if you did, just save the results as (email:pass) and done.
run your cracking tool or sentry mba, get some proxies, and start cracking. zeus

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if you want, i can give you some good tools to crack accounts with mate.