Each transaction on Fantom requires a transaction fee paid to the network in order to prevent spam attacks. The fee is paid in FTM (Fantom's native token).
Transactions fees are paid to validators to reward them for processing transactions.
Rewards distribution is fully controlled by an SFC contract. The SFC contract can be upgraded by governance at any time without hardfork.
30% of transaction fees are burned. The burn has happened since the launch of mainnet in December 2019. You can check the status here: https://ftmonfire.fantom.network/ The remaining 70% of transaction fees are distributed between validators proportional to their
transactions reward weight.