Here is the post from AllEars. Note the update as of today. Still doesn't make sense to me. There may be some added money to Disney, but it sounds like a lot of additional paperwork for everybody.
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Last week, after the All Ears Newsletter had been mailed, we became aware of an unannounced change in Disney's policy regarding tickets that were purchased from non-Disney sources. Several guests reported that when they attempted to add a day to their Magic your Way ticket that was purchased from a non-Disney source, they were refused and told that they would have to spend more than $100 for a single day ticket. Several tried at both their resort concierge and at a guest relations window and were told the same thing.
We called the Disney Ticketing office and and spoke to a supervisor. We were told that commencing with last week's price increase "3rd party tickets can no longer be upgraded to passes at a pro-rated rate, have days added, or have options added at a discount." A different call to a second Disney source confirmed it but added that this does not affect AAA.
On the basis of that, we changed our ticket FAQ to reflect the new policy. More refinement of the policy will likely become known as time passes. We will keep watching the situation and listening to our readers' comments about any problems or successes they have had in this area. - March 3, 2014
Update: March 5, 2014 - the new policy is effective on tickets bought from 3rd party sellers by guests who try to beat an increase in gate ticket prices. The new policy requires you to pay the difference between the old ticket and the new ticket first before you can do any upgrade. We have no information yet as to how Disney will separate those ticket purchases from ones that were made prior to the latest increase or how many previous price increases may be affected.