Just ran into the 20% on EY C AUH-CGK. About double lap infant price as QRs 10% AUH-DOH-CGK, but figured the 150$ or so loss was worth it for more convenient flight times and no connection.
It was also a steep 102$ for the lap infant on EY C DOH-AUH coming into DOH on QR, but no QR seats for parents into AUH.