I could go for some scheme where the first 10 years are free, and then you have to register for $x where x is a value that doubles every year. That allows the b

I could go for some scheme where the first 10 years are free, and then you have to register for $x where x is a value that doubles every year. That allows the big IPs to get roughly what they want for commercially viable stuff, but also means that 99% of stuff will drop out of copyright quickly.