The key is good content, curating an outside source, if done with the express permissions granted to the user and done in a way that both parties agree is ok to use.

IE I can just include a link to a youtube video, if the youtube license allows this and the youtube video is played within the browser from youtube thereby granting the original creator youtube money. As per the whitepaper this is doing "work" for the network and curating such content to my followers is providing value that the network rewards me with.