They are paying for the Platinum verion of the service... Which is stupid because you still have that banner showing up (only thinner - so it doesn't take up as much screen space)...
The reason why I asked if user switching was possible was because they have their own settings and favorites, etc... My brother-in-law likes his settings and my sister as well - the reason for setting up the 2 seperate accounts in the first place...
I guess it isn't possible... Well, doesn't really matter being I just found out they are thinking of moving on to broadband!

So then they wont have that problem.
Thank anyway!

SlickVic78