Do the developers have other jobs?
I think every hour I see work being done on Nodebb.
One of the perks of having a team that (almost) never sleeps, I guess. I'm the most traditional, working 9-5 hours, while Andrew and Baris work from noonish to the wee morning hours;
If you check our punchcard, actually, you'll see that there are some dead hours between 4-8am.
This project is a labour of love from the entire team. We don't yet make enough to support ourselves purely with NodeBB, no, but we are also not employed at other companies, which does give us more freedom to contribute to NodeBB.
Edit: I swore I just saw @psychobunny's avatar pop up at the bottom...