Well, well, well.
I just made a dummy booking to New York in CW in April 2009. They want 15,000 Air Miles, which is triple the economy rate BUT it books into I class, presumably offering TPs and miles.
For the same flights in distress class, they want 5,000 Air Miles BUT it books into V outbound and N inbound, so some miles at least.
Curiouser and curiouser.