Long ago, tokens were needed to play the casino games, which were the only way to get tickets for prize and joy items. Since tiles came out, they've been essentially useless, because AFIK it doesn't cost any of your gaia stuff to play it and it gives out tickets at a rate that feels a lot faster.
So all these tokens seem worthless. their only use is to play cards or slots, and those seem to be made obsolete by tiles.
Having played tiles, I think that cards is a far FAR more reliable way to get tickets. In any event, the gold worth of tokens is 1 gold, because that's how much you pay for an individual token at Prize and Joy. While giving us new games or ways to use the tokens would give us something to do with said items, it wouldn't actually raise their gold worth at all.
Cards is way more reliable when it comes to ticket earning.
However tokens instead of costing 1GG per token lets bump that price up a bit to make it a better gold sink.