It was probably because the post was off topic for the thread. Also it may have to do with the fact that it is just a link, not information whatsoever. You should actually write something and reference the article instead of just pointing a link to it.

At first glance, it looks like you are advertising MMM global. It would be better if you said something about how they are scammy (as the link describes) and had something like "see this link for more information" at the end of the post to direct users to more information.