Voting
Voting refers to any system of making multiple choice collectively - it is typically used in elections to form a government which must make binding decisions that affect everyone, or elect a board (or sometimes even the management) of an enterprise, or choose various measures that affect company operations. See w:voting systems for some more depth on this.
See edits, votes and bets for the debate about how to decide the final Consumerium buying signal.
Three types of votes have been suggested to measure the support of campaigns:
Direct and Indirect votes seem to overlap with the proposed WikiVote system and this is one of the open questions that need to be resolved