Bundled Premium Plugin Activation
You don't have to activate them and they'll work for you regardless of that.
Some plugins may ask for a purchase code for registration/activation once installed, however, you can simply ignore these messages as bundled plugins do not require activation or registration.
Any time the plugin is updated, you will find the latest version of the plugin in the includes/admin/plugins or config/plugins folder of the theme. (how to update premium plugins)
You can read more about this here: https://help.market.envato.com/hc/en-us/articles/213762463-Bundled-Plugins