It was originally planned to be implemented with the release of v6, some servers even have gelat shops in preparation. However, Stefan and or Unixmad are too afraid to put this into effect fully because they think they will lose money.
Unholy Nation recently applied to get observer removed adding several gelat shop items and trial restrictions, yet they still got refused "because the f2p model does not fit that type of server". I find this funny because iClassic is just about the same thing yet it is incredibly successful.
source:
http://forums.graalonline.com/forums...5&postcount=40