Nuare works on a lot of games, they just showcase the most prestigious ones. You can spend a lot of money for sure, but it doesn't mean you can't pay them for something smaller and cheaper, maybe they made the legs for Hasan's teaser, or helped him put his "teaser" together, heh.
Nuare situation is a bit weird, it made me suspicious in the beginning, but in the end we don't know their motivation, maybe some Hasan's friends are working there, maybe they had a good laugh at the conspiracy and decided to participate, maybe Hasan's sad puppydog eyes act worked on them. It's like the only thing that's really unusual, and there are still explanations for that.
People also spend money on their hobbies, it's not that weird. I wrote couple of George Martiniesque sized novels in spare time, because I felt like it. My friend spent her monthly salary on book cover for her self-published book, and I bet people in Netherlands have more spare change on the whole.
I wouldn't be surprised if this time Hasan decided to take things a bit more seriously, this is his once in a lifetime opportunity, and the guy is somewhat delusional. Some people will buy his indie crap for shits and giggles, out of sympathy, so that they can try to "decode" it, etc. If he can make game on the cheap, it could be worthy investment, now that he has public attention.
I also had daytime job, I would come back home and fall asleep, then wake up and be unable to sleep till 4-5 a.m. I lived like this for years, hell even now if I don't go to sleep before 12, I can't go to sleep before 3 a.m. There is condition wrt to how your brain works, not sure how to translate it to English. Dude who wrote HP: MOR sleeps for 24 hrs then stays awake for 24 hrs, sleep patterns are very hard to change. I have plenty of friends who work and stay awake deep into the night, admittedly they aren't working at the factory or something. Freelancers can organize their day how they want, for example, some people are much more productive in nighttime, myself included. Those are just some tweets - not much effort.