On the season ticket money, my understanding is that the way the insurance policy worked, the club was obliged to repay the season ticket money to the ticket holder which they did by giving them a free season ticket.
The club then tried to get the holders to donate money to the society in the hope that they would make out of it.
If people did this then the club made out of it but if people kept their cash - and they were well within their rights to do that - then the club didn’t make as much out of the insurance policy.
As to the money spent on the pitch, £100k savings a season is a players wage - or could be a massive difference if we go down.
edit - not sure how much the club make from season tickets each season but I’d be surprised if it’s over £1M