I know that they are an indie team who made joe danger series, and they admitted that the game is so hard to make. But I still believe it costs the 60 dollars due to the team dedication.
And it isn't comparable to Spore because this game has a lore and has a story to it which is really different than spore. They didn't even make greater hype in e3 this year because they said they wanted to make the game better(which means that the team is working hard on this game). and NMS is based from Sci-Fi Books, which makes the game looks as if its a book not a game.

you can know more about the lore of the game here: