I found it weird that the phone shipped without Facebook installed. But after downloading and installing it, I was prompted to authorize HTC Sense. I did that, but I still cannot add it to BlinkFeed. If I check the box, it holds for a few seconds before unchecking itself.
Anyone else have the issue? I am running the semi-nightly betas from the Play Store.
However I did succeed in adding Facebook about an hour or so after this post. I had to uninstall Facebook completely, and then select the option to download it through BlinkFeed. It redirects to the Play Store and after installing again it worked as expected.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?