You never know what will prompt someone to make a visit to your website.
At most sites where comments are accepted, there’s frequently the choice of attaching a URL to one’s name, so I usually attach my website to my name. (If I’m not willing to stand behind my comments, I’d have to ask myself why, and reconsider the comment.)
One person with whom I have sparred on a number of occasions followed the link. Last night, he bought two prints of the lighthouse at Peggy’s Cove (#2).
So I will continue to put my name to my comments, state my opinions (civilly, usually), and take what customers that may bring me.