They charge that fee because they know you suckers will pay it!! Get a grip and avoid company's like CTC & rishworth etc.
You know I was invited for interview recently by a similar size airline in Asia and they paid all expenses including my flights to & from my home, hotel, even breakfast lunch & dinner was included.
FZ is a rip off company heading towards ridiculous T&C 10K for FO & 15K for skippers is a disgrace considering you will fly in to rocket attack zones & live in hell hole Dubai.
They need to pay you for interview! And up those salaries by at least 30%