Theme authors are not allowed to include the purchase codes for the premium plugins that are included bundled with the theme. However, you don’t have to be worried about this, because each time a new release is available for any of these plugins, we will also release a new update for that theme, including the latest version of the updated plugin.
Also from version 2.6.1 of Kalium we have implemented “Remote plugins updates” so you no longer need to wait for theme updates to get the latest version of bundled plugins, you’ll get plugin updates right after their release so to update them you just need to go to Appearance > Install Plugins area.
You can purchase those plugins if you need support for that product, auto plugin updates or want to use extra features that some plugins offer.
For more information about how to update premium plugins please read this article Updating Premium plugins.