Been saying this for years but it has to be said here. The term "exclusive license" has to be taken in context. It's not "exclusive" meaning it belongs to you and only you. Its exclusive meaning you have free reign to license, distribute, profit etc. as you please unless otherwise stated. If a beat was posted to YouTube or online marketplace, that means it has likely been leased and stolen by others. Their songs with that beat will still exist in the ecosphere.