Hi,
In each template, there might be have 2 types of extensions integrated into, those are complimentary extensions and JAEC Extensions Used. When each template releases, we also give out a list of complimentary extensions and ‘JAEC Extensions Used’ for reference via release news.
Complimentary extensions are the extensions which are built in each template and you are free to use them without paying any extra charge under your JATC standard membership permission, you even can use another template as you wish.
JAEC Extensions are the extensions which are listed within JAEC club, in order to own/access to JAEC club, you are required to subscribe our JAEC Standard 1 year 50$. .
JA Comment component is part of our JAEC (Extensions Club) >> http://www.joomlart.com/joomla/extensions/ and is not available to JATC member but it is but it is used in demo site and it is supported styling already for JA Pyro as stated in its release news.
You can check the JA Pyro release article for the list of complimentary extensions >> http://www.joomlart.com/joomla/templates/ja-pyro/ << JA Comment component is not part of it
Go ahead to join JAEC extensions club to get download link for JA Comment component.
Thanks.