Yeah I don't think it stacks with Military/Police either(which those don't stack with student eithr)I had inquired to three dealers around me and they all stated that I could not combine the student discount ($500) with the private $750 coupon from the brochure/email offer. I have seen a few people on here back that up as well.
I did this also and received 2 .Submit several brochure requests. Use different names of people in your household (coupon is transferable within the household but not outside of). Submit each brochure request with a different email address as well. I tried 3 different email addresses and only got a coupon emailed to one of them.