Simple answer is I don't read Every post in Invite board, Plus there are other members who have the right, to invite.
Second I have the highest number of people invited, other than site owner.
I also find I have to mute the account, of some I invite, and others that think it's ok, just to sit in here.
The main reason for a mute, is by them, not following the most important forum rule, All Members Must Be Active.
UPDATE: see above marked in red