Thinking of BKK for the first time in my life (not for one night as it might make the hard man humble but for an entire week in Conrad with points). Can it be so that the biz-flex fare would be eur 4351, but the additional costs would be negligible eur 53 altogether? Usually the additional cost without Avios would be much bigger...

(QR would have been over 1k more expensive and not included the domestic sections)