What you're talking about was most likely including a link to the site in their name, such as in Wordpress posts. Those type of spammers actually have chosen to

What you're talking about was most likely including a link to the site in their name, such as in Wordpress posts. Those type of spammers actually have chosen to write things like "Nice, insightful post!" because it's generic and fits any blog and is more likely to be accepted (stroking the ego of website owners).