They’re still figuring it out and I believe that they’re also still pre-revenue. With that being said, if you’re able to capture a large part of the python ecosystem, I imagine business ideas won’t be too hard to come by!

See also this comment which has more information from an interview with their founder.

https://news.ycombinator.com/item?id=44358482

A private package registry is a pretty exciting idea! I honestly wouldn't have expected that idea from them.

If they do pursue that idea, I wonder if they'd also have a public component to it that could act as a better PyPI?