uclick Tests Selling Subscriptions to Comics and Puzzles on the Web: Results Revealed: This is a good case study of how uClick converted from a free to fee model.
“More than 10,000 people switched to the paid My Comics Page offer immediately in September, and more join daily. The combined total of paids from both projects is now ‘a little over 25,000,’ says Pizey. Not too shabby for test project that even he had little faith in initially.”
The formatting of this article is horrendous — it looks like a bad email conversion. But the content is worth it.