Not sure it's quantifiable but it does definitely increase the person's overall interest in your project, I'd like to know also.
As an author when you see other author's with great marketing tolls you just have to keep up and use as many ways as possible to promote your books.
Thanks Logan for your interesting comment !!
This might get boring but I'll do my best, I missed out a 'y' in they, i corrected it in version 2. 'There's' is a perfectly correct way to abbreviate 'there is' , this is NOT an error.
The YBC site is not mine, however i have spoken to the owner, who I know ell, and he says he purchased he tracks.
I've written two 100,000 word novels and numerous short stories, what have you written?