I think in BMA’s day it was more like £25 ow, £50 would be return. That’s why one of the companies I worked for stopped doing nightstops overseas because you had all the hotac, crew costs etc for an aircraft full of punters from whom you were getting peanuts. IMHO feeding long haul from short haul only works if it’s one carrier and the system revenue is what matters. Otherwise the short haul partner is screwed.