the EE answers were never really behind a paywall, simply they were so hidden at the bottom of the page that a normal user did had the idea to scroll fully. After all, they needed to present the information to the google bot.
Because it is.
Click through to this recently answered question from Google's search results[1] and scroll down to see the answer. Then open the resulting link[2] in an incognito tab and poof no answer
[1]: https://www.google.co.uk/search?q=experts+exchange+%22Troubl...
[2]: http://www.experts-exchange.com/Programming/Languages/Script...