"So my username is GabeN@Valvesoftware.com, and my password is MoolyFTW, so you can try to log in and steal my account if you can, but you can't!"
Gabe Newell, the 721st wealthiest individual in the world, did a move in 2011 that would have been baffling for a wealthy man to do then but would be rather run of the mill today; he leaked one of his passwords.
Well, if leaking a password involves saying it out loud to a crowd at an intel press event. This was at CeBIT in Germany, on 5 March 2011, to demonstrate Valve's latest addition to the games platform: two-factor authentication. Having been released on Steam as a beta the day prior, SteamGuard would send an email to a user's email address containing a one-time code to authorize a new machine. Gabe releasing his password, in theory, would not make a difference as you'd need his email password.
But given its appearance at an Intel trade show, this is more than just an email being forwarded. Gabe is being used to demonstrate Intel Identity Protection, which at the time was DRM (though Gabe insisted it's "User Rights Management" not Digital Rights Management) baked into certain Intel chipsets, not unlike a USB dongle. Your processor generates security hashes, and when presented a key from Steam's login, it should produce an identical hash every time (Hardware 2FA is significantly more complex than this, but this overly simple explanation will suffice for our discussion here). This is, in theory, the safest form of authentication as you will never have Gabe Newell's specific Intel processor and thus cannot log in, as you cannot pass that authentication with any old processor.

Steam accounts, being part of one of the largest digital storefronts for any media, are the subject of phishing scams quite often, with Gabe mentioning that 60% of all Support Tickets at the time of the SteamGuard announcement were users trying to reclaim stolen accounts. 2FA on Steam is just about mandatory given its popularity and the amount of money that flows through it, securing that information is vital... but is using specifics about your processor the right way to handle that?
Evidently not, as visiting the SteamGuard beta link provided above includes a link to the Intel IPT knowledge base page on Steam Support, which... doesn't exist! Valve ultimately opted for email and SMS-based 2FA until the Steam mobile app rolled out support, and now users can log into their Steam account by scanning a QR code on a mobile device logged into the same account, and ultimately the storefront is about as safe as any other application with mobile authentication support.
There's no way that's Gabe Newell's password now, if we're being honest. This was twelve years ago, and Redditors as early as 2017 have confirmed he changed his password, so the saga is over. Valve has been on the record for doing over-the-top marketing stunts in this era, such as teasing Portal 2 at a GDC talk in 2010 to the sheer volume of Genuine-quality items in Team Fortress 2, so whether MoolyFTW ever was Gabe's password or not, its use then was to push SteamGuard as the future, and nowadays it's just a weird footnote in Valve's place in gaming in the early New 10s.
