Is it possible to take off completely or at least modify the "See Original Story" link that appears at the bottom of the page for each post?

I'm creating some information products that will have lots of information to sell and since I have many other sources on the same site it gets the RSS from that I may use to create other applications to sell as well I would like to hide that link to avoid the user accessing to the information without paying

If anyone knows please let me know, thanks a lot!