Early Access Games May Never Be Finished--Steam

From the Steam Early Access FAQ.

“Its up to the developer to determine when they are ready to ‘release’. Some developers have a concrete deadline in mind, while others will get a better sense as the development of the game progresses. You should be aware that some teams will be unable to ‘finish’ their game. So you should only buy an Early Access game if you are excited about playing it in its current state.”

RPS article

I guess I kind of just assumed that as a matter of course. Kind of like a Kickstarter project. You’re backing something you’re excited about, and there is a certain degree of faith involved.
I certainly wouldn’t invest in an Early Access game (or any Kickstarter project) if money is tight.