If I remember correctly, there was an old (very old) project with reversible links called Project Xanadu. if my sketchy memory serves me, it was based around u

If I remember correctly, there was an old (very old) project with reversible links called Project Xanadu. if my sketchy memory serves me, it was based around using a currency and updatable links. Along with that, the idea was that you could also share segments of movies and music with the hyperlink system. I'm pretty sure it died a pitiful death due to it being completely secret until after HTTP got ingrained.