So nothing like Lloyds situation, whereby people donated to his Indigogo of £25,000 but still had to buy the book.
Just to be clear, I'm defending crowdfunding as a viable concept, not Evans' particular use of it.
The nice thing about crowdfunding is that you can structure it however you want. As long as prospective supporters know what they're getting into, it's fine. The idea that your support doesn't also get you a copy of the book... isn't something I would do, but as long as your supporters know the score, it's on them. To me, the dark side of crowdfunding is that it's another way to scam people, by asking for support and either lying about what they are paying for, or taking the money and not delivering. As far as I can tell, he didn't do that.
Taking the money and publishing an unflattering book that ultimately helps to cement your reputation as a creep and a jerk... is also something I would not advise a prospective author to do. But this is page 268 of a topic dedicated to his lack of sound judgment, so it's also not surprising.