Cool story bro. There was (and likely still is, because you clearly haven’t found it) a keylogger on your system when you logged into Steam at some point.
You can continue in denial if you want, it literally makes no difference to me - I’m not the one getting HIBP Stealer Log emails. Just trying to warn you, I wouldn’t log into anything you care about getting hacked until you find out what caused the breach.
Dear lord I can’t believe this is only now becoming a feature - those redirect spammers are the worst! What do you gain from making my life more difficult? I just close the tab and search again, this time with your website blacklisted.