The developers weren't just intentionally vague, they outright lied, straight yes-or-no answers to straight yes-or-no questions about what was in the game, just days before the release. Then even after release they continued to lie about it. When two players went to the same place at the same time to see each other (something the developers had continually insisted was possible), the developers pretended it was a bug - even though they knew damn well that it was physically impossible. The game has no real-time net traffic needed to support multiplayer and there is no serious player model included in the game files (there's a couple comical temporary development models in there, along with a monkey in a hat, the Fallout logo, and a bunch of other amusing stuff, mind you).
The reason that so many people played for so long before seeking refunds was because the developers kept insisting that things were in the game that most definitely weren't. And they put in this huge "grind" to try to slow everyone down, to drag out how long it would take for them to find this out. When a player playing nonstop for 20 hours managed to reach the center of the galaxy (the goal) on the same day as release, going through the relentless over-and-over clicking to do so, the developer's "solution" to the "problem" was to cut the distance you travel per warp by a third, tripling the clicky busywork. And they introduced a bug at the exact same time they did so.
And BTW, after being told that everything's at the center of the galaxy - that the creatures get weirder, there's more going on there, that there's a big exciting ending there, you know what's actually there? Absolutely nothing. You go to the center and the game actually punishes you. There's no ending, just an animation of you flying out of the center and it crash lands you in the next galaxy, which is no different from the current one.