The basic concept can be extended by the following elements:
Group of participants can be considered as composite participant. Any singular user can create a new groups, as well as to leave the existing ones. All participants in the system are included into the special 'global' group. Each group has a reputational characteristics that are equal to simple average of the relevant characteristics of the members belonging to the group. The group's activities are based on the decisions taken by vote. Weight of vote of member in the group depends on the user's reputation. Possible to use the following strategies to improve the efficiency of the voting process, depending on the type of decisions:
Everyone can install his own copy of Zero Exchange, which will work in conjunction with other copies. There are two modes of such work possible - as a mirror, or as a separate instance with an independent database. In the latter case possible to establish barter exchanges between the copies.