Your greatest control is on your own gullibility.
Don’t buy from Kickstarter. If you do then accept that risk.
If they can make the product, they’d simply make it. If they have doubts, they back the risk off to those willing, they try to get money and cross fingers they can make it.
Plenty of Anker products got canned, it’s a brand where every non-gullible person would wait for it to ship, reviewed, they buy (with free return just in case, with a credit card can refute if no repayment).
Public forums cause the opposite effect, as any risk contained in a statement, e.g. “available in one month” turned into two months then it causes a negative reaction, so your public question force silence, and wait til everything is lined up. So you are causing the opposite of what you want.
Best advice is to withdraw your backing, wait for it to be released, wait for reviews, if good then buy. For all you know there could be an inherent weakness in the design an early review finds and then you wished you’d bought another.