> changes within .git directories occur far too often and over so many files that the Backblaze software simply would not be able to keep up.

I don’t really understand that. I’m using Windows File History, and while it’s limited to backing up changes only every 15 minutes, and is writing to a local network drive, it doesn’t seem to have any trouble with .git directories.

>File changes within .git directories occur far too often[..]

That's a crazy statement. The cloud backup system I use can be configured to how often it should bother even looking for new files, and for the section where I have my .git repos (they're actually "bare" git repos and I push to them, locally) I've set it to every two hours. Which is actually overkill because they absolutely do not change that quickly.

This is idiotic. All they have to do is schedule them and then introduce enough hysteresis to not constantly churn on their end. Even if they backed up at most once a day this would be better than this idiocy.