Thanks for all the compliments. I would like to say some few points regarding the questions raised by you:
1) There is no restriction to change, modify, redistribute this code. You can check this link for details phpseo.net/license.html.
2) We would be more happy if you can share your modified code here. In return if your work is appreciable we will put a link back to your site and your modified work. And also in future you will be included as our team member.
3) If you really like the work you can also help us by giving a review on JED following this link extensions.joomla.org/extensions/communi...tion-a-answers/22307. This will help us a lot.
4) As this is a free component we don't have any other benefits. So we request our viewers to help us in one or the other ways.