The BitKeeper license changed in a way which I interpreted to mandate publishing the repository contents under a free software license. (it in fact just required making the contents of the repository available)
I kept layouts of the boards in the repository which were neither under my copyright nor free.
Thus, I believed was no longer able to use it.
(I'm now using Subversion for this and other projects.)
Since then, the BitKeeper license changed once again and now includes a non-compete clause. The current license requires mandatory upgrading, even if the new license has changed.