So I have been noticing that a lot of my competition is leaving a lot of non sense comments on high ranking blogs. What they are doing is either
A. Linking the username they are using back to the page they want to link or
B. Within their comment on that blog leaving their URL in the text or end of comment.
Question is does this even work to get links back to your page? Is this that even ethical SEO? Might be a dumb questions but how am i suppose to fight this when its already hard enough to come up with unique content for a e commerce site and then i have to battle my competition doing this?