Well, maybe so, maybe not.
Read the book called "Term Limits". It's a GREAT thriller read (IMHO) and about as politically incorrect as you can get. But it got published in the traditional sense and sold a ton of copies.
Such stories as that, or as the history of "Unintended Consequences" or even "Left Behind" (both of which are even more Un-PC) can give us all hope with respect to the ultimate marketability of our own works.
Right now, word of mouth is my best friend. Perhaps that will one day equate into larger sales...I'll leave that up to the Fellow upstairs and keep on writing. Got one and a half books to go on a five part series that will end up taking two and a half years to write. It's been a great experience, lots of work, lots of midnight oil, lots of frustration...but in the end very gratifying and fun.
Best of luck to you.