The thread you linked was just the opinion of a forum member (not a moderator or administrator).
We do get quite a lot of questions from people who have saved a couple of dollars by getting a clone from eBay and then take up a page of (one or more) threads trying to get it to work, when the "real" one would work "out of the box" so you can see where some frustration might come from.
However I've done a lot of posts myself about making gadgets with the "pure" Atmega328 (and other) chips, which are not directly using an Arduino. No-one complains about them.
I don't know the point of your original post. If you can quote "someone with authority" who has directly told you not to post here, unless you have purchased an Arduino (and how would they know?) please do so.
These forums could be hosted for < $1/mth.
You must be jesting.
According to WolframAlpha the arduino.cc domain gets around 1.5 million hits a day. Its disk fills up annoyingly regularly as people post megabyte attachments of the schematics or photos of their projects.
You might want to also post a link to this "less than $1/month" web hosting site that would provide such hosting for a pittance.
I got a message from the forum administrator a while back (2012):
We have updated the servers and they are very fast now (and very expensive)…
So if you know of "very fast" servers which are only $1/month I suggest you write to the webmaster direct and let him know. Don't hold your breath waiting for a response.