The other thing I’d like to add is some kind of requirement that works be available (e.g. it should cost a lot more if they want to hide it in a vault) but that would need care to avoid publishers screwing creators if there’s a dispute, as is not uncommon - you wouldn’t want the threat of putting something in the public domain to be used to force the creator to agree to unfavorable terms. Maybe something like all assignment contracts are unconditionally voided without compensation if the company chooses not to make an item available for sale/license at standard rates for more than n days in a 5 year period?