The truth is: it depends on if you are lucky and the project you are backing up is produced or if the project owner/company just runs of with the money.
No matter what, if kickstarter gets its 5% for successful funding, they don't give a sh*t.
So keep in mind, kickstarter is neither responsible nor willing to help you in case of problems or if your money is gone.
Conculsion: kickstarter is like gambling, but the odds are worse.