Skorpiono
You do not need to worry about any licenses for the plugins we use in the theme, I have taken care of it on my end and it will not affect you. I have made deals with various plugin authors to use their plugins freely and my users can also use them based on the license they purchase for SA.
However, if you do wish to learn more, you can refer to the documentation page, scroll to the 'plugins' area and use the dropdown for more information.