I don't see any reason why donating money to a company would be illegal, and I am sure Kickstarter did it;s due diligence. Also, keep in mind, many people are

I don't see any reason why donating money to a company would be illegal, and I am sure Kickstarter did it;s due diligence. Also, keep in mind, many people are 'donating' money, but they are getting a functional product delivered to them. In essence, Kickstarter is just a method to get pre-sales for a product, with the understanding that their is risk that the product might not get delivered.