Modzzz announced the transition to UNA, but apparently, they're still learning the new structure.
As for copying an app from AQB or anyone... You can do whatever the app developer license is allowing. We release all our apps under MIT - so you can build upon any of our apps and resell, but we still reserve the right to delist a product from the UNA Market if it doesn't add value, or is in effect a slight tweak of an existing app. As for AQB - they are listing their products under different license terms, which imply different rules. Remember, MIT license is not viral - you can take our Posts module for example, rebuild it and release your product under a proprietary license if you want.
In other words - we are largely giving away most of our modules, yet we do not require everyone esle to do the same.