Does your device use bluetooth in a special way or just general purpose Bluetooth usage? Did you have to pay that much just to put the "Bluetooth certified" logo somewhere?
You could owe licensing fees just by putting the word Bluetooth on your website. We didn't have the Bluetooth Certified Logo anywhere and still don't.
If your App uses Bluetooth the fee is around $100 per platform, but since it is a hardware product (my product, GarageMate, is a garage door opener App), the payment due is much higher. It doesn't matter if you are pre-release. And if you change the chipset you have to pay again. Note, you could save a few thousand by using a pre-certified module.
FYI, the Bluetooth SIG's enforcement lawyer called right after I signed up for their free membership using my company e-mail address.