Quoted from Jvspin:
I hope Kevin sees that by far the majority of people beating the drums and making accusations have no money invested. They aren't the ones he needs to satisfy.
In my opinion the best thing to do is just let that stuff roll off his back and get on with the build (even though the drama on Pinside may cause a few actual buyers to ask for refunds).
They do need to satisfy the non-buyers. Reputation is key, and if they want to sell any other pins, the people he 'doesn't need to satisfy' certainly won't be new buyers, nor will the previous people who were in on Predator want to buy anything else.