So, for example, in a MoneySense article on increasing auto premiums, we find Harry Tsai commenting (here) that "You can save $$ on car insurance premium !!" Clicking on the link under his name takes you to the webpage of SID autowatch, a maker of vehicle security systems.
Similarly, at a Money Canoe article on increasing insurance premiums in Ontario Harry Tsai leaves a nearly identical comment (here) advocating vehicle immobilizers.
And SID autowatch? Apparently Mr. Tsai has a financial interest. Here is a picture of him manning their promotional booth at an industry function.
Which brings us to our point: oppose comment-spam by voting against comment-spammers like Harry Tsai!