You can, actually. You'll have to make that change on github.com though. Go to your profile and scroll down until you see your contribution graph and click "contribution settings" to change it. See the image below.
Once you've done that, we'll have to re-fetch your contributions.
I do, in a way. Since the whole point of GHE is that your enterprise controls everything, I can't get it automatically like I can with regular Github.
I do not. I've never used it so I'm not too familiar with it. I looked around briefly at public profiles on BB and didn't immediately see the data I'd need. If you want to get your own data, you can submit it to the API. Send me an email if you want to try that out.
I do not. But there is a (very tiny) API. Let's chat!
They're printed on thick, durable, matte paper.