Judging by who's involved in the project, I'd steer clear. People wouldn't stay long with them anyway even if they stump up money for an interview and actually get a job.
Asking people to pay a huge sum to attend an interview is just the low of the low during times of hardship. Exploitation before you get a job. What would it be like after employed ?
To those who are currently out of work as a result of CV19, bide your time as best you can and don't be drawn into false hopes. If an airline wants you pay huge sums to attend an interview, then they themselves don't have much money. Speaks volumes.