1) Ayu celebrated TeamAyu having reached 70,000 members in December (by doing some hiring
~).
http://www.ahsforum.com/forum/showpo...36&postcount=1
2) I don't know if they have privileges at the show itself, but they do get first priority when buying tickets, so they probably do get better seats.
3) Ayu's "Official Online Fanclub" was established around the time LOVEppears came out, if I remember correctly. Its name became "TeamAyu" when the trilogy was released a few months later. The first CD I saw whose liner notes advertised the club was "AUDIENCE", and then the magazine started in early 2001.
4) That one, I couldn't tell you, but if TA members ever started leaving, it woulda probably been between 2003 and 2005.