Jax.Money allows you to receive a yield on your holdings. There is a special pool responsible for yield distribution. Each time there is a swap between WJAX and a localized derivative (JAXUD, JAXRE, etc.), a mark-up fee is collected. A transaction fee is also taken from the receiver each time a transaction is done. So, every time you send a transaction, your transaction fee goes to that pool. The same is true for markup fees on any swaps carried out via Jax.Money.