The club makes a decision every season on how many new season cards will be made available. There's never been a commitment or guarantee any year that new cards would be made available or, if they were, that these would be the exact number not renewed. There could be 2,000 cancellations and only 500 new cards offered. That's the club's decision and none of us can really have any influence on that. U til we go through with the North Stand expansion, our capacity to offer new season cards is very limited.
What I do know is that they did commit to offer a limited number of new Silver season cards before the renewal process started. It's of course possible that they took the view that a few hundred wouldn't renew, as always happens, but even if they were wrong, and every single person, including deferrals, renewed, those cards would still have been offered.
And if you're already a season ticket holder, as you say, and had no interest in these new cards, then why the hell are you bothered? How does it affect you so much that there is something on these that you "need" answering?
You're behaving like the poster who asked me why I didn't get one if City Matters supported their introduction.