[lojack]

NEO Gas is an example of this. Gas is a token that represents a fee that can be paid for executing the smart contract. Unlike Tether, when a smart contract is executed the Gas is consumed. NEO uses a consensus algorithm called proof of stake, so more NEO Gas is created using a coin (neo shares) which represent your stake in the consensus. In this case both the token (gas) and coin (share) have value, but the token can be redeemable for something -- smart contract execution.

Here's a list of fees associated with the token: http://docs.neo.org/en-us/sc/systemfees.html