Yes, it does.. I once spoke to their cust service to try and redeem my M&M miles for 9W tickets..the agent was not sure of the taxes and surcharge involved but told me tht it will b taken separately once I given them a request for redemption by filling out a form.. as 9W miles redemption happens online, I realised it was too cumbersome and expensive to redeem partner awards in 9W..
I guess this is with most airlines.. ifu redeem their miles on their flights then its the best option we have.. even though the value of these r also going down steadly worldover nowadays...