You're right, you are kinda spamming.
Still, you substantively commented on the post, so I'll cut you slack. I can honestly relate to the frustration that comes of trying to promote and running into ignorance and apathy.
Still... there is something to be said for simply making relevant comments, and letting the quality of your comments drive subscriptions to your blog, where you can post advertisements.
Just sayin'.
Yeah I've cut back on it, I want to be more legit :)