I don't think it's fair to call Nathan a liar or a thief, I'm sure he does wish he could produce all the hardware people have paid for and send it to them, but his health prevents this. Nathan has debilitating depression, and I know exactly what it feels like. You feel the weight of the world on your shoulders yet it's hard to even get out of bed or find the strength to type something, let alone get lots of work done. The more hurtful things people say, the worse it gets, and the longer and harder it will be for him to get better.
Also, I think people need to just forget about the money they spent. Cut your losses, don't dwell on them! At least you still have enough money to feed yourselves, which is more than some of us!