Welcome to Kickstarter. I treat Kickstarter as it was originally intended to be used - to back people with good ideas, not as a preorder system.

I think even now, there's no actual guarantee that you'll receive anything. That's why they're called "rewards" not "orders"

You give them money, they are able to work on bringing a product to market. As a reward, they MIGHT ship you whatever the thing in your reward bracket is.

I almost always eventually get what I ordered, though often it's VERY late, and I think in every case where they couldn't get to market, I've gotten my money back (the last one was Pebble 2). But legally they could just take your money and walk.

Indiegogo, OTOH, is a complete crap shoot. It's generally what you use when all you have is ideas, and no clue how to actually make it work. Anyone who has an actual working prototype and a good business plan would be using Kickstarter instead.