We thought that was a good idea too, so we implemented it. Now you can list the Subscribed Links you want to add in the XML specification of your CSE, and just like that, they'll appear in your customized search results. Our documentation tells you how and illustrates with an example.
Some special search features you can add this way include:
Browse our directory to get an idea of the things Subscribed Links can do to enhance your results. Or make your own and share your expertise with your own users and other CSE creators while you design the best results for queries in your domain of knowledge.