I belong to fifty or so groups and actually run one group.
I find that most admins fall into two groups (there should be three).
The first group: I'll let anyone post anything, and I'll also post to see if I can get some business.
The second group: I'll restrict posting to only a select few (my friends) regardless of how germaine a post may be from someone out of my select few of friends. The result is a giant advertisement for the firm.
The group that is far and few between is a group that culls the garbage, the self-serving ads and provides value to the group members.
So here's the question... Do you find value and which groups have value to those in the office of the CFO?