This is something I can't bring myself to do either. Shelvis and I talked about this. We both are the type that want our book to make the desk ONLY IF it is truly loved. Well, those are my words, but similar views.
It's just a personal thing.
I have nothing against spammers and people who ask for support. I have backed about ten books just to help out, some of which I have never read. But, I want the people who back my book to have read it and loved it and want to see it succeed.

Hi Racheal
Totally agree. I want people to read and comment, if they like it star it, if they love it shelve it. Out of the five books on my shelf only two of the writers back mine. Their books are good, that"s why i support them. I came on to Authonomy to see if my writing was perhaps good enough, not to get into a world of dillusion and back scratching there is enough of that elsewhere.