If you asked every developer on earth to implement FizzBuzz, how many actually different implementations would you get? Probably not very many. Who should own the copyright for each of them? Would the outcome be different for any other product feature? If you asked every dev on earth to write a function that checked a JWT claim, how many of them would be more or less exactly the same? Would that be a copyright violation? I hope the courts answer some of these questions one day.