The Open Locksport kickstarter is one notable disaster: https://slate.com/news-and-politics/2012/10/schuyler-towne-a... Back in the day there were an endless series of "$100 3d printers". Etc etc.

Adding the required 50% margin to the BOM of a consumer product is painful and unintuitive. Most kickstarters are done by regular people, and as a normal consumer it can be hard to be appropriately pessimistic when pricing a product you have to manufacture and sell. It's endlessly temping to lower the price.

Yes, they price their product without understanding what it costs to manufacture something and then find themselves shipping units at a net loss, or not shipping at all and carrying around a burden of guilt. At least four 3D printer kickstarters failed in this way and three or four drone kickstarters that I watched but didn't participate in also failed in this way.

Exactly this. Plus there are lots of other hidden costs (FCC certification, UL testing, etc that inexperienced people aren't aware of to bake onto the cost.

I've heard that Kickstarter, etc. Are best used as marketing platforms. I.e. only put a product on there once you've made it to the point where you are ready for mass production, have the suppliers waiting, and even products in hand. It's doesn't work to "launch" products from the concept of prototype stage to market.