In general I think of a lot of tech blogs and stuff. They may have some breaking news or hot topic blog post that gets shared and backlinked like crazy. Any popular site like WF and even YouTube...those are all inner pages when shared. So as far as inner pages getting backlinks I don't see anything abnormal about that. In fact the project I've started is almost all backlinks being built to inner pages. I would make sure you at least have a few links to the homepage though 
Good questions
Good questions