Ok, ad first:
If not priced "free", then "reader sets price". (And yes, they allow $0.)
Why? Because it's Human Rights Day and Radomir Lascek, pirate captain of the Solar Wind, is campaigning like mad for human rights in his year, 2116, 100 years from today, in a world gone totalitarian.
Here is the link:
This will only last until 2pm tomorrow, GMT+2.