How Many Brokers Can One Person Manage?

In North Carolina, real estate firms are supposedly supervised by a Broker-in-Charge.  Each office of every firm is supposed to have a BIC who is responsible for ensuring the office meets NCREC requirements.  The NCREC requires BICs to supervise Provisional Brokers much more closely than Full Brokers, but that is to be expected.

But here is a question:  How many brokers can one BIC supervise effectively and responsibly?  I truly do not know the answer to that question.  But here is a Broker-in-Charge with 900 licensees under her supervision.  No, that is not a typo, and if you click the link, give it a minute because it takes the database a few seconds to bring up the whole list.  That is more than six percent of the entire count of MLS-subscribed brokers in our market.  Imagine that.

She must be some sort of management wizard!

Or...Could it be that she has absolutely no idea what all 900 of her brokers are up to?  Maybe it does not matter?

Really, I am just wondering....

Look, I know there is some structure there.  I see names on her list who are also BICs.  So I suppose those brokers are running their own teams, out of their own offices.  Nevertheless it does seem odd that someone would assume that level of responsibility and liability, and the firm would assume such a shaky risk management structure.
𓐵