You are downloading the Disqus APPX file v18.104.22.168 for Windows Phone. Disqus is a free and useful Social app: A mobile gateway to thousands of live discussions across the Disqus community of communities. Find, follow and discuss the stuff worth talking about, ... You can now download the offline APPX file to install & try it.
Download Locations for Disqus 22.214.171.124 APPX file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline APPX File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Disqus APPX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.