Companies and people taking part in maintaining and running a blockchain network need to be incentivized to keep doing so, this is done using gas fees, a small fee for any transaction that they process and add to the chain.
Major changes in ANote Music's platform state are mirrored on Algorand, which has been built on proof-of-stake, a consensus mechanism that requires way less energy than most blockchains, and is sustainable by nature. However, even with proof-of-stake, people taking care of the chain enjoy a small fee.
As of now, ANote Music covers all of these small fees.