The first (and last) time I put in money was in the crowdfunding days. In fact, I did it so early they weren't even using Kickstarter for funding.
Even though the current alpha is very buggy, I also more than got my money's worth over the many, many years. I really would like to see the game get finished. But, what's already there is really impressive.
The game has missed every possible deadline, and there's every chance it will never be finished. But, the one comforting fact is that it's missing the deadlines because they're being too ambitious. Like, they redid the game engine to use 64 bit precision instead of 32 bit because they want it to be possible to drop a wrench at some random spot on the surface of a planet, and have another player fly across the solar system, go to the right spot, and see a wrench sitting there.
I wouldn't put any more money in today, but I'm still glad I helped fund the game, and because I've been able to keep from adding more money, I actually consider my money well spent.