I've been buying C+ fares for the past month now through my corporate travel site. While C+ is technically a W ticket my understanding is that it still is just a underlying coach ticket (YBMSH...) When I purchase the ticket I can see this by looking at the fare basis code.

So my question is this... Purchased a W ticket last week that was an underlying Y ticket. I was expecting to get 150% MQM bonus but when it posted I did not. Is this expected since its a W fare?