They are under a bit of pressure with PSR rules so they will be looking for any financial contributions, that helps them stay within the rules, through reduction in wages/income from transfer fees that don't impact the first team squad.
Great match and well deserved win for England though they left it late despite dominating the second half. Some really good performances and plenty of competition for places when full strength squad is available.
Peterborough had a one year option to take him to 2026 and wanted him to sign a new contract which he refused. He obviously wanted away hence the low sale price.
If every single fan boycotted attending professional football then it wouldn't be long before TV companies would be offering money for spectators to attend.