"Reverse discrimination" is generally legal under EU law.
For example, EU law grants the non-EU spouses of EU citizens living in an EU country other than the EU citizen's home country much broader right than the EU citizen's home country otherwise might.
I randomly picked next Wednesday (December 17). There are several offers for 9,90€
> Are Austrian residents excempt from the "full regular price"?
No, and that would be against EU laws.