Even though you are trying to warn people, you've accidentally fallen into Kickstarter's "dark pattern in broad daylight" by using the word "preordering."
Kickstarter donations (I consider it a charity) are not pre-orders. If I preorder a book on Amazon and it is late, tough for me. If the publisher closes down, Amazon gives me my money back.
Kickstarter donations, on the other hand, don't even have that recourse. We're giving them money out of the goodness of our hearts, and if everything works out for them and they feel like giving us our reward, we receive a nice "thank you gift."
Kickstarter transactions are charitable donations. We don't get a tax receipt, but if things line up, we do get a reward. If we think of it as charity without the tax benefits, we won't go wrong.
But the moment words like "preorder" or "purchase" enter into the conversation, we've fallen into the trap of thinking that we're consumers purchasing a good or service.