* "I would order this..." * "I wouldn't be interested in purchasing..." * "I often buy things [from Kickstarter] in the hundreds..." * "I have no intention of actually buying a printer..."
This project for instance is just being advertised as a cheap alternative to things that already exist (claiming they don't would be a big stretch of the implementation details).
Kickstarter would lose most of its business by not allowing these kind of projects. People are more likely to bid in stuff they can easily figure out, rather than completely novel and seemingly far-fetched ideas.