It's clearly rule #2
ITS SPAM, throwing out a quick somewhat on topic sentence every other comment doesn't make it not spam.
Besides that, it's disruptive. I think that's clear by now. There are a lot of people of the board that would be more than willing to "just ignore" things if the mods actually made an effort to remove the worst offenders.
BTW, what's with all of the new tripfags?