I'm only laughing at the forum being good for speculation.Reasonable point for sure. All we have is speculation and this forum is great at it
I guess QF may not have been given a choice in the matter - in respect that QR sets up QR/VA and puts in their stipulation regarding earn on QF domestic flights ONLY if on a QR marketed international flight itin. Sure, that's QR's choice to do and clearly driving the revenue to them. Probably designed for the routes that VA doesn't serve - so if you book, I don't know, Athens to Armidale on QR ATH-DOH-SYD and the only interline (and "partner") option is SYD-ARM, then yeah we'll let you earn because VA doesn't do it. OK.
I guess given QF's T&C have been updated some months AFTER QR/VA and the QR policy re QF domestic flights (again, I was unable to confirm when that change came in, or if it's always been a condition?) that it's reactionary to QR's move. Further QR's conditions are very specific, while QF's are generic, which to me is a coverall for this and other situations.
Which came first? chicken or the egg? well... only QFF can really answer imo.
The strange part to me is why the need to put into QF T&Cs? I think the argument that QF cannot tell QR what points to give to QR loyalty customers is reasonable. (I have been trying to avoid entering that "heated" discussion). The condition in QF is unenforceable, really. Of course it helps that QR have a similar condition, but it is the QR condition that will give effect to the QF condition. (if that makes sense)
Sure all that payment stuff also makes sense; follow the money and all. But if it was only a QF condition QR would be perfectly entitiled to decide to wear the cost. That makes teh QF condition redundant, IMO.
But your example of Armidale is interesting. Since, I assume Virgin don't fly there, therefore a QR loyalty person would earn if they flew SYD-ARM as a standalone under the QF condition. (i think)