Possible Clues:

• Feature of subscription-only websites
• Website's block of nonsubscribers
• Always wrapped at first in a cloak of obscurity? Not a feature of our website
• This denies access always when initially entering the cloud
• Barrier at site entrance: parking, indeed with everyone
• Reversal of rule brought into play changed system for online subscribers
• Website barrier to non-subscribers
• One may need to cough up to get over this writer's block to cover Bill's return? Bill is central to Hillary!
• Websites that allows access only to paid-up subscribers are behind this
• NYTimes.com went behind one in March 2011