egnxema
You forget, or possibly are not aware, that the majority of flybe route deals will be based on fully refundable/changeable rules.
You may initially save a lot of money by going for a low fare that has no flexibility, but in the long-run your company will probably save money by using negotiated fares.
I see so many tickets coming across my desk that have been booked on non-refundable/non changeable rules and where, even allowing for refund of taxes (less £25 per sector penalty), there ends up being an extremely high loss.
Take British Airways as another example where you may accept a lower fare which you can change at a fee of £60.00 plus any difference in fare to the next available level. Change your booking a couple of times and you soon can be paying a higher total cost that if you had paid the full fare in the first place.
Scottie Dog