Hi Skywalker. Well, with 15000+ people doing these things it's hard to know if anyone gets a coupon code.
Last year, I got a coupon code just by googling it. It ended up being a coupon code that was distributed to those who didn't get shirts the year before.
The year before that, I got a discount from being a DVC member. So in short, you can probably get a coupon code if you're in the right place/right time. Let me know if you find any. It's always good to save some money.