We don't do "company hack days". If you feel like hacking on something, hack on it.

We do have days where multiple people will be waiting in line waiting for their chance to deploy their tweak.

That particular day consisted of staff deploys on multiple in-progress branches, some performance tuning, bug fixes, etc. Nothing crazy.

I'm also quite sure the number counts deploys across all of our applications. For instance, deploying a change to github-services counts as two, since I have to deploy changes to GitHub.com also.