I tried linking to a photo I'm hosting in a Pro account: https://twitter.com/mahemoff/status/431487389866139648

Even for a Pro account, the image redirects from Twitter. It doesn't redirect me, but it redirects everyone else (I tested from Incognito mode). Which seems not quite what I thought I was paying for.

Also as a paid user, if I click on anyone else's images, they still redirect like they would for a guest/free user.

EDIT:

Thanks to Haywain for spotting it changes on 2nd load. Can be replicated:

* Open fresh incognito window

* Visit Twitter link and click on imgur

* It redirects

* Go back to Twitter window and click on imgur link

* No redirect - it links straight to the image

I verified this with a random imgur link too, so it seems there's no difference between Pro and free.