When I finished the first graphic novel, I was fresh out of grad school and a complete unknown in the comics world. I felt that launching a Kickstarter was risky without something to back up the book, and without developing any kind of following. As a result, I ran it as a webcomic before doing a print run. I attribute this choice with that campaign's resounding success.
It's been several years since then, and things are a bit different. I've done the convention circuit and built up a following. At this point, I have enough support that I can forgo the webcomic buildup and jump straight into making the book.
The fact is, these books were always meant to be graphic novels, not webcomics. My initial choice to post the book online only really gave a sneak-peek at the project, and, given the choice, I'd rather present the book in its intended form.
Don't get me wrong, I still love webcomics. I even have a running webcomic, my comedy strip COSPAIN (www.CosPainComic.com). For THE LETTERS OF THE DEVIL, however, I'd rather present it the way it was meant to be read: as books.