Moonlight is still in its early stages but we are doing thousands of dollars per week in business. Our average hourly rate based on paid contracts so far has been $146.79. We're focusing on more specialized work rather than generic web development from scratch. Early projects have ranged from a custom algorithm for a hedge fund to some infrastructure work to support Tensorflow. The benefit to companies is that they have access to specialized engineers for focused projects, and they can get a match within 48 hours.
If you're interested in short-term projects, you can join at https://MoonlightWork.com/apply - we're working on increasing the number of projects, so sorry if it takes a couple weeks to get a first project match.
We're going though YC's Startup School MOOC, and we did live office hours with Sam Altman a few weeks ago. You can see the video here: https://youtu.be/abtHadERzXU