philM
As the "missing" 1000 are seats vacated by last season's not-renewing STHs then that would mean selling match day tickets dotted around the E/W/N stands, rather than only in the South stand. Doesn't seem likely. ?
Not sure why you say that as single seats could be bought in the other stands last season - I know because I know of several occasions when we were able to bring mates along to games and get seats in the west stand (they tended to be the less popular games as they don't have many Royalty points but they did get them). They were single seats then but they were available if you asked.