Today HQ posted that their is a one year moratorium on any new challenge caches
I posted below what is on Geocaching.com
Challenge Cache Submissions Moratorium
Beginning April 21, 2015, a one-year moratorium is in effect on all new "challenge cache" submissions. It does not impact previously published challenge cache listings. Why is a moratorium needed?
Challenge caches encourage cachers to set and achieve fun goals. They run the gamut from finding caches on every day of the calendar year to finding one for every Difficult/Terrain combination.
However, there are many aspects of challenge caches that can make them frustrating for the community. They are neither a separate cache type nor do they have a specific attribute, so the logging requirements are easily misunderstood. Challenge caches can also be very difficult to publish due to the large amount of subjectivity involved relative to other geocaches. While they account for only ~1% of all geocache submissions, challenge caches comprise the bulk of appeals made to Geocaching HQ.
In order to properly evaluate and fully focus on the challenge cache system, it is necessary to have a period of time that is free of new submissions. What happens during the moratorium?
HQ will work with the community and Community Volunteer Reviewers to address shortcomings in the current system, with the goal of adding clarity and retaining what makes challenge caches so much fun for players.
The process starts with you. Visit the User Insights forum to tell us what you like and don't like about challenge caches currently. We'll use your feedback to create a survey that will be available later this spring. Once we've gathered data from the community, we'll get to work on building a better framework for challenge caches.
In the meantime, the thousands of challenge caches that already exist will still be out there, waiting for you to find them! Note: The moratorium does not apply to challenge cache submissions that were enabled for review as of 12:00pm (19:00 GMT) on April 21, 2015 and met all geocaching guidelines at that time.