The red flag would be not realizing how complex your vision/game has become, keeping piling up promises on top of the initial, already very ambitious promises and missing the intially targeted release by probably more than two years without giving any dependable release date. Also financing the whole thing through pledges ranging from reasonable crowd funding average for games to thousands of dollars.
If you're anything but an absolute space game fanatic and/or stoic believer in Chris Roberts' abilities to make his vision a reality, also taking into account the generally unfinished and often broken state of the piecemeal alphas we get to play, then sure, this ought to raise a whole lot of red flags for you. And taking the one other halfway comparable space game project into account
(yes, Elite...), which started out at a similar point, released when Star Citizen was initially supposed to release, was and still is in a woefully unfinished state years away from even coming close to its
own ambition not to mention
Roberts' one (Star Citizen minus SQ42), but is today still more complete and less broken as a game, that doesn't give any hope for Star Citizen's "PU" coming anywhere near its own vision in the next two years. And that's ignoring many of Elite's hair raising design issues which only show because it's a playable game and not a vision of the "BDSSE" in people's heads
. Who's to know that the "BDSSE"'s design will be any better or that it'll avoid any of the pitfalls Elite finds itself in? Before it's released and playable, it's mostly imagination, trust and projection. The gulf between those and what they actually have to show for themselves other than impeccable assets is narrowing rather slowly.
I'll eat my words of course, if in the next two years,
I'm playing cocktail mixing minigames, commanding AI flight attendants, all in a seamless believable space/ground PU while experiencing "
Prevalent use of NPCs" (whatever that means), all without running into a bug that catapults my player character out my civil space craft into the void without hope of returning, chrashes the game to desktop or slows it to a crawl. And
of course all without relying on the rampant forced grind we can experience in Elite, the mostly samey and uninvolving exploration game mechanics, as well as the hair raising RNG based game designs leading to more grind.