Hi!
The problem with greenlight is that players must vote for the project in order to work. So players need to know that the project exists on greenlight. For that, we need to advertise our project, in an extremely competitive market, even if our game is free. This therefore involves a lot of work.
We would like to publish our game on this platform. But we prefer to wait for the post-greenlight (Steam direct ?) and that the project is a little more known. At least, we will try to do that with our next project.