Marrenas, everything is explained in the thread Sanjay_149 gave:
Soon will be an authorization change. Login form will disappear and uNet
users will have a button like on facebook and twitter. Eventually the sites
will have either local or global users, both wont be possible. We consider
that usage of global users would be better. There are lots of reasons for
that. If you think different, that's ok, your money - your choice therefore
premium users have this choice.
All further discussions go into the mentioned thread.
I'm not active on the forum anymore. Please contact other forum staff.