10 years ago (!) Instapaper changed its tune and started requiring emails for new accounts. Before it had not required emails (just usernames) and even didn't require passwords, and after living with that for years Marco decided to switch back to the more traditional form.
It's interesting to think that times may have changed and that people are hesitant to give out their email addresses anymore, but you are giving up some real benefits by leaving it out.
https://blog.instapaper.com/post/2318776738
It's interesting to think that times may have changed and that people are hesitant to give out their email addresses anymore, but you are giving up some real benefits by leaving it out.