To take your car analogy further, the dealer offered to refund your purchase price up until the time they actually started to manufacture your car. So... if you "grin an bear it" you did it of your own volition, since you could easily have walked away at any time. Yes, BFL was late. I've apologized for that numerous times. But the fact of the matter is, people could have elected to get a refund at any time up until we started to manufacture products in bulk and started to spend the pre-order money on product manufacturing.
If I bought a car in October 2012 and was in the middle of a long queue for that car and people at the front of the queue started receiving their cars in May 2013, but I didn't get mine until September 2013, I'd expect a refund up until the start of September. The argument that you bought all the parts in April 2013 for all the products that you had orders for is specious. Car manufacturers are smart and operate "just in time" supply chains, or "lean manufacturing" to use their parlance. Also the Toyota method. That is, they don't warehouse huge amounts of stock for all their orders. When the car enters the production line all the items for that car are ready, but nothing more.
If you really did order everything up front, then you are idiots. If you had confidence in your own products, you wouldn't worry about refunds, because you would know that you would be able to sell on your high quality goods to other buyers. The reality is that, at the end of April, you knew you had massively oversold a dud and outdated product that, if you continued refunds, you knew you'd never be able to sell.
Truth hurts. Stop lying.