They'd be worth a bit...The financial report would have a value for them (price less amortisation).
Mind you, as I've pointed out before, if you sell them, then you just have have the same machines, taking money from the same people with the only difference being whose pockets the profits go into, thus removing any claims to it being a moral move.
True, but the board would arguably be in breach of its duty as directors by simply holding the licences and not using them (i'd imagine there would be some holding costs involved there as well - government fees mostly).
Morals are all well and good but directors still need to act in the club's best interests. Holding a multi million dollar asset without exploiting it out of spite possibly fits that definition. North Melbourne seems to be taking a moral stand - but its amazing that it only found it's moral position on pokies after it tried and failed at running its own.