I feel whatever be the reason it was a wrong move to move Python to github which is new sourceforge just more shiny. I hope the Python community get together to support either kallithea or trac or gnu and move there.

In an open letter recently group of open source developers raised and highlighted pitfalls of using such closed source for profit infrastructure without community oversight. Also it shows the opaque nature of such services. It's not wise to rely on goodwill of investors of github looking for profits. Also from ethical point of view it's really bad moving to a non community for profit infrastructure for a community driven project.

This is same mistake like moving from Python 2 to 3.