If you can't sell, or don't know how to sell anything......and I mean anything....it won't matter if yours or anyone else's StartUp raises funds via KickStarter or any future Equity Crowdfunding platform, Angel or V/C. You've got to spend money to make money (depends on your circumstances as to how much or how little you spend), and you can't worry about debt. You had better worry about selling your idea, solution, MVP or doo-dad to make it in the market. Or be born with a silver spoon in your mouth.
Presales definitely have associated with them an obligation/form of debt. There are good reasons to do presales campaigns such as (perJohn Currie) a form of marketing and a way to show traction to investors as well as getting feedback.
If you are delivering even a moderately complex device (as opposed to say simple already written software or something very simple to make) then after you have to subtract the material, manufacturing(including tooling), labor, shipping, returns, and marketing cost from the proceeds, you will likely be left in the hole.
As the Bolt article points out, it is revenue but with a debt associated with it. The presale will often only be defraying a part of the eventual costs for which you will be taking on as an obligation to delivering the product. And as the Bolt article points out, you should only be using the presale money for things directly associated with the product build (not design and overhead for example).
Thus it looks a debt and you might not even know how much you debt you have taken on if you are waiting to build the product based on pre-sales, like many beginner companies. It likely will take follow-on sales to actually turn a net profit.
Worse yet, some pre-sales campaigns have "stretch goals" that obligate them to add more features which can dig the hole even deeper (the more goals they hit the more they are obligated to lose).
Probably a good summary of the Bolt article is, "if you think that presales are capital, then you are going to be in trouble".