How do I protect my idea on Kickstarter?

Fidget Cube, a small desk toy with buttons and clickers to fidget with, raised $6.5 million dollars on Kickstarter.

Within one month of funding, there were already knockoffs flooding the market, month and months before the Fidget Cube was able to ship to backers.

Even after three months of working with a digital brand protection agency, it was too late. The pirates won.