I want to be super clear that I'm not proposing some finalized plan or numbers here, it'd need some real work spent hashing it all out. Mainly though I hope people will consider more the huge space of untapped approaches to balancing various benefits and costs towards a better societal outcome. And that maybe that helps a little in getting us out of some of the present seemingly intractable boxes we so often seem stuck in?

Your tax idea could certainly be another useful tool. My main immediate thought/caution would be:

>IE: if you make profit off of it, then it cranks up. There's plenty of music artists who's song blow up a decade or more later.

As we have endless examples of, "profit" and even "revenue" can be subject to a lot of manipulation/fudging given the right incentives. I also think that part of the cost I describe is objective: whether it takes off right away or takes off after a decade, as long as it's under full copyright it's imposing a cost on society the whole time. Also other stuff like risk of it getting lost/destroyed. So I do think there needs to be some counter to that in the system, sitting on something, even if it makes no money, shouldn't be free.

But the graduated approach might help with this too, and again they could be mixed and matched. It could be 1001.3^n to keep full copyright, but only 501.2^n to maintain "licenseright", 25*1.15^n for "FRANDright", and free for the remaining period of "creditright". Or whatever, play around with numbers and consider different outcomes. But feels like there's room for improvement over the present state of affairs.

That's how you end up with "Hollywood accounting" where movies that gross over 100M dollars still show as a "loss" for tax purposes via creative accounting methods.

When old art gets a revival like that it's usually because the work is being reused (e.g. song used in an ad, Tv show, movie), something that costs time and money to license when done legally. How many artists lost their chances because navigating copyright is tedious and expensive?