This is weird. Czech Republic (Czechia) is not in the list of eligible countries but every other of our neighbours is O.o. Including Slovakia and Austria which both are even smaller countries than Czechia by number of Residents. I wonder why this is.

Edit: Judging by the comment of required business email and gmail for example being blocked, I consider this hackathon somehow with their rules arbitrary and can't consider this to be some kind of fairly judged hackathon for those prices.