carla,
The elders are all aware of everyone's hours. In most congregations, that means at least some of the elder's wives are aware of anyone's hours they ask about. So, it may as well be posted.
But in nearly every congregation there is at least one Brother or Sister Weneversee, who doesn't EVER meet for service (unless the CO is in town) but gets slightly over the national average every month anyway. The subject of much discussion. How they get so much time is such a mystery. Sister Knowsevery-Jwintown has asked around and Brother Weneversee isn't meeting with their group. He works as an accountant, so it can't be informal witnessing on the job.
And there are other slander and gossip clichés that almost every congregation has. It is the lack of love that proves it can't be God's organization, not charts of contributors.
Respectfullly,
AuldSoul