The airline is a going concern continuing its operations back into profitability. It is in a far better position than it had ever been and stronger to manage challenges.
It requires a bond / sign up for people to remain with them.
It is exactly the same position as many other airlines - with Brexit and other forces changing - it is inevitable there will be significant risks.
They are not asking for money upfront - this is a paper bond which is payable if you choose to leave.
If you want a job then that's the deal - although I can see it not going down too well with skippers and current Q400 people going for this deal.
Which leaves flybe in a position where they still remain short on people -> leading to cancelling flights = challenging times!