Add a radio switch to the profile page creator that allows it to act as a direct link to something instead of a full page. This way, someone could neatly link things such as social media accounts directly, instead of plain [ a ] links.
So are you thinking two different radio buttons that change the text box? One reading "external URL" that switches the textarea to a URL entry box and the other one saying idk "normal profile page" that makes it a textarea?
By 
By