One thing folks need to learn is to never, ever confuse marketing with anything remotely approaching the truth.
Misrepresentation in advertising is not only the norm it's taken as a given. That's what all that fine print no one ever reads is for. That's why there isn't a single software company on Earth that takes responsibility for its product, why EULA's are full of "using our product is at your own risk. If it destroys your life, it's your fault for being stupid enough to trust us in the first place". Critical thinking and healthy skepticism are hallmarks to be encouraged before one buys anything.
"Pre-Alpha footage" - even that huge section of gameplay they flogged way back when about spec-ing out your keeps can be spun into what basically amounts to their version of fine-print. They can legally say "well, we don't care what you saw or how cool it was - what you got still resembles it sorta, so we didn't technically lie. We never said this was how it was going to be, even if everyone asked at the time said exactly that. At the time we meant it. You were under no obligation to believe us and if you did, well, that's your own fault. Things change.Sucks to be you, we don't actually owe you anything and aren't responsible for what you think we said, even if we did say exactly what you thought you heard."
You can't really do this in any other industry other than software and get away with it as much as they do. They write the rules to suit them, they always have, because they're in a 'position of necessity' - the world doesn't run right without their product, so if we want it, we have to suck on it. Just the way it is.
Of course, in the 80's the entire gaming industry collapsed over this rather short-sighted and disdainfully arrogant attitude. "Too big to fail", y'see...