There's no automated spam link removal, to my knowledge. This is my thought of thinking:
- users with <10 rep can't link more than 2 URLs
- Since the person couldn't link, I presume the person just pasted the wall of text, with the intention to add link later
or
- The person is copy+pasting the content. Since textbox is plaintext not richtext/html text, all formatting, including links were lost and the person didn't bother to verify..