True...there is no proof as of right now. But, I believe if both teams figured the market won't be greater than what they are offering, then they would allow the players to hit the open market to see their worth. Then ask if the players would give them a chance to match. Similar to what the Boys did with DeMarco Murray. It wouldn't happen because they know there will be multiple owners paying them slightly less than CJ money. I would love to see both teams agree not to franchise them next season and see how it plays out. Pretty sure no way the teams would since we all know they would be off the market second and third respectively behind only Russell Wilson, Phillip Rivers or Eli Manning (if hell freezes over and their teams don't extend them).
This formula being used by Dallas and Denver will likely be used by Atlanta (with Julio Jones) and Cincy (with A.J. Green) next season. Franchise them twice and then let them hit the open market. Hopefully the players don't get injured at all under the tags and ultimately receive the security they seek in a long term deal.