This is pretty normal, users who have this enabled would not have the admin permissions to install apps from sleazy websites. The store also includes things like games and social media apps which corporate love to block. IT support is another issue, if users can install random apps from the store then they will expect IT to support random apps.

We also had a look at the enterprise store recently to publish our own apps too, but the reliance on azure cloud means that we'll be publishing through other means for the foreseeable future.

It's amazing to see how MS destroying it's own platform.