Qlik is planning to launch Certified Extension Program during the second half of 2017 and focused in some Qlik authored extensions and then increase scope.
A Certified Extension will mean that it has been inspected by Qlik, has run against Qlik test framework and ensure that it is not a performance killer for the engine. Qlik will also ensure that the person who has authored the extension will be providing fixes and updates to the extension.
Those extensions will be post under certified extensions on Qlik Market.
Note: All other extensions as it is today, are currently supported and will be supported from their creators / authors and are not governed by any Qlik Maintenance Agreement.