I think people realize they need to sign up to vote or comment, but seeing the description is illogical and immoral (you're asking people to give you their email to see content you didn't create). That's like if HN or Reddit didn't let you read the articles they link to without creating an account.
Thanks for the feedback wavesounds, and I definitely hear what you're saying. You've convinced me to make the change - we'll make sure to flag to the wider team for the next iteration!
