From a commercial point of view, they already have your money. It's not so important whether existing players stay or play on, than it is they can fix things enough to attract new buyers in the medium to long-term, and then again when 1.0 is released. What weight they put into the effect feedback on Steam and other sources may have on future demand may have some small influence but not a great deal. The launch was clearly financially time sensitive, and they needed to raise money at that point or not at all. Otherwise why launch the game when the poor condition of key launch features was already known and well documented. The alternative would imply an eye watering level of developer incompetence, which would seem unlikely.
Building and launching a game is first and foremost a business proposition. FB will weigh up the commercial risks and make a decision guided by the expected outcome(s).
My guess is that launch raised sufficient funds to get them through the financial hurdles they faced at the time. Whilst they have an obligation to maintain the current functionality of the launched game, they will ultimately focus on a roadmap and timeline which will enable them to reach their next financial target.
As valid as all your opinions may be, your participation or otherwise in that process through playing the game, feeding back on bugs, being the next Starbase YouTuber or content creator, or latest poll to canvass current opinion of the state of the game, is not going to significantly shift the needle in their plans under any circumstances.
Play or don't play. You've given them your money, what you do now is up to you. FB will be thinking about what needs to be done to secure the next group of buyers (I mean players). That is less time sensitive than many would have you think. That timeline will be driven far more by commercial need rather than user base opinion.
My counsel, for what it is worth, is don't waste your time thinking that forum posts like this one is going to have a significant impact on FB's development strategy or direction. It will not. Don't kid yourself that server numbers or whether or not you choose to play will have a similar impact. It will not.
We can choose to feedback to FB on bugs, and offer our opinions as to what we would like and not like. That's one of the benefits of a player-base on a public alpha is that you have hundreds of testers who have paid you for early access to your game, both in money and time. So remember, you've paid for early access, accepting all the risks that come with what early access means, with an expectation that the game will be completed within an indeterminate period of time based on the published road-map.
Right now, it is what it is.
Having been in closed alpha, and spent around 250 hours in open alpha, the current mine build loop has run its course for me and I look forward to more significant features being added in the future, at which time I may return. I only hope this happens before the next new game/distraction comes along to occupy my finite spare time. I am under no illusion that my decision to play or not has any impact on what FB does next.
Good luck everyone. Fly safe. Enjoy whatever game you're playing.