This could start a trend towards moving away from Kickstarter. So far, the more famous projects that have pursued funding from a similar model without using Kickstarter itself (e.g. Lockitron, App.net) have done so out of necessity – they weren't allowed to use the Kickstarter platform. But if people keep succeeding without being hosted on Kickstarter itself, that 5% fee might look more and more unattractive to peopl…
I guess it depends on how viral and interesting your product offering is and how well you market it. Kickstarter has the benefit of a large user base with lots of traffic. Though as more projects are listed on KS it becomes harder to be found.
I've surveyed backers on Ouya (a runaway kickstarter game controller). They found out about it through precoverage on enthusiasts sites like gamitron. Very few of the backers came from Kickstarter itself. Lockitron did something very similar on techcrunch. That tells me that the key is promoting on enthusiast sites.