Hardly surprised by Flybe axing AMS. Have used it on 2 return trips, not paying a lot, and on each of the 4 sectors the load did not exceed 20 per flight. One of them there were just 11 on board.
Always seemed a strange route TBH as it is already well served by Easy for O&D, and not even KLM could make it work with a massive connection opportunity at the other end to aid it.