We just removed ours. The only benefit I can name is that it confirms your ability to communicate to the user if they lose a password, etc. And, it probably i

We just removed ours. The only benefit I can name is that it confirms your ability to communicate to the user if they lose a password, etc. And, it probably incrementally adds to the value of your company (presumably a company would rather have 500,000 confirmed email addresses than 500,000 unconfirmed ones... Of course, given drop-off...)