Somehow due to accounting rules in the US, companies can take payment for software before it is done, and they can't count it as revenue somehow. So it sits there waiting for the feature to be done. I've seen it at big software companies in the us and at tesla (which is kind of a software company too). Found this random person on reddit who discusses it. Who knows if it is accurate but it matches what I've read elsewhere. https://www.reddit.com/r/investing/comments/10qpasz/tesla_co...