Aha!
I just sent a PM to Barrus about the same issue and then came here to start a thread, but obviously others have noticed the same.
I came across two back-to-back examples of it in The Clinic and thought maybe I was missing out on an inside joke or something. Then I saw the same in the Pro Racing forum and knew that something was going on.
I too also noticed that when quoting the "infected" posts, the HTML for the link was hidden from sight.
Creepy.
When I click on the link, my address bar very briefly flashes a link to "skimwords" before fully redirecting me to the eBay site a Giro helmet auction.
Which led me to track down this:
http://skimlinks.com/skimwords
If CN has decided to use this software as a means to generate income then it would've nice of them to at least announce their intentions ahead of time. This is exactly the kind of stuff that infuriates me the most about digital technology and and how the internet is manipulated by those behind the curtain.
You need ad revenue? Fine. I understand economics. But could we know about it before these little surprises pop up?
I'm not going to rant too heavily until I find out if this was done intentionally on the part of CN administrators or not. But I will share one concern since the method does exist and very well may be in service here or may be up for consideration by the owners of this site.
A link to Garmin products from the word "Garmin" has an obvious connection. And since the company is the main sponsor of one of the top cycling teams, the connection is all the more pertinent.
BUT...when the word "Giro" is used to refer to the race, and the link is to an auction for helmets
that merely use the same name, well that's an entirely different spin on an already intrusive idea. People often cleverly embed links into their posts on this forum, and was I expecting to see something that related to the Giro d'Italia or reinforced a point being made in the post.
If we have no way of knowing what were about to click on (is it a commercial for product, or an entertaining member-generated link?) then that is detrimental to the whole experience of even being in this forum in the first place.
If these are appearing by design, then I, for one, will cease to embed links into my posts and just paste the url so as to avoid any confusion.
And I'm since I'm not actually ranting yet

let me just add that there is no way in hell that I would stop in the middle of a thread to do some shopping just because a link was slipped into my reading experience. It tends to leave a bad taste in my mouth towards those very same advertisers as well.
But of course, I'm
not ranting...yet.
Edit:
Very cute. I just noticed that the use of the word "Giro" in this post has now become one of those "secret little links."
Starting to hate...