Well no wonder.

The Lulu Titlescorer tells you how likely your book's title is to make it a bestseller. Turns out Worlds Collide only had a 10.2% chance--no wonder it hasn't sold into royalty yet! Unfortunately I am not that good at picking titles, apparently, since Violette Between only has a 14.6% chance. Hm. At least I know where to go now to test drive my titles before making my final decision. (And yeah, yeah, I know it's all in fun...but I'm still going to run some bestseller titles through it to see how well they score. Just in case.)