This. Creating artificial scarcity of a completely electronic finished product is a braindead marketing strategy.
You mean it's so simple that everyone should have had this idea?
Well, they have. Thousands of software developers write code - an entirely electronically existing product - and sell them to their customer. Exclusively. Corporations write management software for their operations, and never give it out to anyone else. It is their software. If it's good, it might even be an advantage over their concurrents. If it's bad... not so much.
Sorry, but there's no way I am buying into this "I will start working into a cool adventure, but only if you pay before seeing it or even reading a review" scheme.
You don't have to be sorry! If you start feeling sorry for all the offers you don't take, you... well, I guess you will never not feel sorry.
Edit: And the "sponsor an artist" stuff is just more marketing spin. This is not the 15th century and we are talking about a finished pdf that can be copied an indefinite number of times, not the sistine chapel or any other unique, irreplaceable work of art.
The difficulty of replication is not the thing you are paying someone like Wolfgang Baur for.
There are certain fixed cost for creating a print or PDF product. It is basically the entire work time that the writers need to write down their ideas, edit them and format them. These costs do not change, regardless whether you sell _one_ copy or one million.
If you know you can sell one million of your PDFs, things are great. If you don't know whether you'll sell ten, hundred, or thousands, you feel less safe. You have to take a risk and hope you reach or exceed the mark where you begin to make profit, the point where your investment payed off. But if you do not have the starting capital to pay this up-front time and to pay for the risks of not making any profit, you can't do your project. You need a way to ensure you get the money.
The ransom/patron project is doing exactly that. But you might need to add additional incentives for people to give you money up-front. Exclusivitivy and the opportunity to actively participate are such ways.
Yeah, it sucks like guys for me and you if we can't get ahold of a product that sounds cool just because the business model makes it impossible. But wouldn't it also suck if that product was never made because the creator didn't have the resources to pull it off?
Of course, there might be variations possible. For example, Wolfgang Baur could provide his patrons with a way to share his profits for copies he sells to non-patrons. But setting up a distribution scheme that is fair to the initial investments and doesn't cost more then the profits it is to distribute isn't that easy, either. And it might still be a reason for some patrons to say that it's not enough.