Would they make much money from SQ42 as isn't it included in all the backer packages and promotions like that AMD one?
Can only guess really!
Not all backer packages no, they split the package a couple of years ago (which was one of crytek’s complaints in the lawsuit as it happens).
Back when they split, they had around 2 million backers... Let’s say by now they have 2.5ish million that have “preordered” S42 for the sake of argument (they currently have 2.7million backers last I saw, so assuming about 70% of these new backers have also bought S42).
If (if!!!!) they manage to actually make a very decent game they could theoretically manage to sell a couple more million if you compare to other extremely successful PC titles. If they go on to next gen consoles with SQ42 (which is now perhaps a viable option, it wasn’t back in 2012) they could sell more over the next few years too and also potentially hook some more interest over to star citizen on PC as a happy side effect.
Let’s say they hit it out the park and manage to sell another 2 million after release, at $60 a pop for the released game that’s a revenue of 120 million bucks, with no publisher to take a cut - would certainly give some breathing room. Even 1 million more copies (so for every 2.5ish interested people that already bought, there was 1 who decided to wait until there was a released game) 60 million bucks revenue would also not be too bad! Anecdotally I have zero friends that own it, and a few friends that like the idea of both games, but sensibly won’t buy until there’s actually a game. Consequently I think the ratio of 2.5 current backers to 1 potential backer is fairly easy to believe personally.
Of course you could also cheekily argue that a lot of people that “bought” years ago have aged since then, probably like me a lot of them have young kids and can’t game as much anymore! A whole new potential market that weren’t even 12 years old back when the Kickstarter launched are now available to exploit for more sales!
Ultimately we won’t know how well it’ll sell until they actually launch it, but any extra revenue from it being launched is better than nothing. I suspect the marketing power of having big names like Hamil etc will garner a lot of mainstream attention, they just have to not screw the game up. There is also the matter of the next chapters which are already planned but can’t launch, sell and profit from those until the first one is out the door.