I think there are two points here.
One/ is that the coupon is not a discount, rather a downpayment. Therefore the amount being small is a good thing, and if anything should have been smaller. Because the smaller the amount, the more people would be willing to risk "non-appearance of product", and if those that paid didn't actually make up the difference and purchase the product, then Amiga Inc would still get tons of cash from people that aren't true believes and should therefore be killed (kidding.. remember the Amiga mag rants against those that wouldn't purchase upgrades to A500s, and yet still had the gall to complain that new software didn't run on their machines).
Two/ is that it is not fair to be misleading as to what that downpayment is for. In other words it isn't fair to commit people to pay for something they didn't intend to buy.
That being the case, it would be perfectly valid to contact the credit card company and cancel the payment, but at the same time you should inform Amiga Inc of your actions and why.
I also assumed that the coupon was for the bundle, not a complete system, so now that I know I won't be buying one.
Not because I think it's a "bad deal" or a "naughty business practice", but because I want to build my machine to my own specs and budget.
The only thing I think Amiga Inc has done wrong is that they haven't been totally clear about what you are buying. I don't for one moment believe that this was intentional deception (hence suggesting that cancelled credit card orders are explained).
