I have been told, in the early stages of the KLM/CO relationship, that only CO flights on CO metal are eligible for FD points.
I specifically asked about VS, because CO had pretty good fares from DUS and MGL to the US east coast, operated via London on Virgin.
However, Mr. Marleen ( one of the best FD agents )told me, that only CO metal counts.....
Beside that, I don`t think that VS flights will count, simple because VS is a major competitor for KLM from the UK, why should anybody connect through AMS, when he can fly one of the best airlines nonstop from London.
But I would certainly appreciate, if VS joins the party...