will i don't know why they going in this direction?
but it seem they going way of Skype and leaving the MS messager's serials in the wind
people still can use the older version windows live/ ms message service
think they going to discontinue the support for the MS messager service version & windows live and only support the Skype serials now on
more detail:
http://mashable.com/2013/01/09/micro...ssenger-skype/