did you experienced this? after deeplinking some pages in our forum, not boards but pages, organic searches increased exponentially
I guess it depends on what anchor keywords that we use in the deeplink. Deeplinking using less searchable keywords won't get you much traffic I guess...
This is totally underestimated in my opinion. My first website I got the home page ranked in the top five on Google for highly competitive terms unintentionally by building deep links. I was trying to rank the inner pages and before I knew it I was ranked #3 and #4 for keywords being searched thousands of times a month with minimal home page links.
I would imagine so, if it was done organically. I can't imagine submitting to every and any deep link directory will do much.