For the majority of Derby games in the last 20 years there’s always been some kind of restriction on tickets, whether that be loyalty points or having to buy tickets for 3 matches in one go. So I don’t think it’s entirely unexpected that you can’t just rock up off the street and expect to get in.
The LP scheme has been going for 12 years now, and, while I get that some people used to get others buying their tickets for them it’s not totally inconceivable for there to come a time when you’ll need your own loyalty account with LP’s on it. I can’t believe there’s 2000+ people with no loyalty account or less than 3/4 games attendance, that seems remarkably high.