Ok, I'm stealing this idea from @jspring86az
You all received your Creator Month in Review email this morning. Let's see how you did.
Here is mine. 
#YouTube @TeamYouTube @YouTube @YTCreatorspic.twitter.com/jZbMbBsIxm
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Makes me wonder if you have to sign up for it maybe? I like seeing these metrics it is really cool @ZakTechReviews growth for sure!
I'm not sure how you opt in for the email. I started getting them in September when I was around 205 subs.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.