It would be nice to be able to earn 'tickets' or 'tokens' by playing arcade games.
We could use these tickets for things such as the ability to change the colour of our usernames, the ability to increase pm space, the ability to buy clraik VIP with tokens or tickets for those who aren't here to buy and sell and don't have access to money (high amount of tokens/tickets so money is still being brought to the site by people paying for VIP), and other abilities I'm too lazy to think of.
Maybe not now, but in the future when more games are available.
This would give people more of a reason to play games, open doors for more game related competitions, and ultimately increase user activity by creating fun events for the community relating to the games.