Tokens and Tokenshop
Tokens are a virtual currency used for various things. You can earn tokens though the Vote Crate, doing daily quests, and sometimes through giveaways. Your token balance can be viewed on your quickboard.
You may consider buying or selling items for tokens instead of money. The only way to currently do this is by running the command /tokens send <player> <amount>. This means that it's a trust trade since tokens cannot be exchanged via sign shops or auction house.