They won't. You won't even have 10% of members at the event, and I'd say that the majority of those will probably have already donated.
Absolutely. Donating money to a football club - particularly if you already buy a membership, which is essentially a donation for many - isn't the top priority for many people. Who's to say that's wrong, either? Not I.
The only thing that's pathetic is people lambasting people for not donating money to a football Club, IMO (particularly when, as members, they're already contributing $ - which for the majority is at least part 'donation').