And, for that matter, the track record of licensed novels vs. original sci-fi isn't so hot. Quality-wise, people working with a license have a lot more leeway than someone trying to get something published on its own merits. I don't think I've ever read one Star Wars novel that was actually inherently worth reading - there might be some minutia about the galaxy's background, or something that's at least partially interesting in terms of watching the film again - but if any of them had to sink or swim on their own, without the Star Wars license to sell it, I don't think a single one of them would be successful.
But this is way off-topic. When did I start ranting about sci-fi again?