The other responses were accurate. Part of it is to be able to afford a little extra help, part of it is to re-spark excitement in the project with people, and

The other responses were accurate. Part of it is to be able to afford a little extra help, part of it is to re-spark excitement in the project with people, and part of it is to buy a little extra time to work on it full-time since the sad truth is that without my other income we're not actually able to live in the Bay Area with a family of four even on this revenue. An alternative is to move somewhere cheaper, which we're also considering. I also added a breakdown of costs to another comment deeper in this thread, in case that's of interest.