Hopefully this isn't too controversial, but issue that might occur with community wiki posts is that newer users with a low reputation might not want to answer the questions since they don't get any credit for them. As such, I would like to propose that a nominal amount of reputation be given for community wiki answers.
Currently, I am thinking something along the lines of the following only having the first up or down vote count and only one answer would count. Consider the following examples:
- User A posts an answer that goes to community wiki, they get twenty up votes on the answer, net reputation gained is 10 points.
- User B posts and answer that gets two up votes and one down vote, net reputation gained is 8 points.
- User C posts an answer that gets five votes then goes back and posts a second answer that gets 15 votes, net reputation gained is 10 points.
My justification for this suggestion is that I think it is in the spirit of the reputation system in that it shows how well you are trusted, likewise, it also encourages people to participate more even when their reputation is low. Additionally, I don't feel that it breaks the overall point of community wiki as only the first up and down vote counts towards the reputation. Thus, on "subjective" or "fun" questions with 100's of up votes to questions, the overall reputation impact is nominal. In short, enough that a newer user is encouraged to post, but not enough to propel someone into high reputation from a single post.