In the latter case, the creators and the players will still need to agree upon some fundamentals. It is important that everyone first agree that they are playing a game. Sometimes, int he case of a reality based game, the rule book is part of the hidden content.
It is therefore crucial that those leading the game are truly consistent in their actions.
For example, if the nature of the rewards is not consistent, players will not appreciate the effect of their actions, nor will they be able to judge if they are playing correctly.
With the ALIAS information hunt, we have made a point of adding new content on Fridays.