I've been doing some really basic copywriting for various books that I've seen on various reading lists and I occasionally refer readers to Amazon. Here's a simple example:
You can get a good audio version of it over on Amazon.
I've been going through my copy and proofreading it, and for some reason, the notion that using "at Amazon" is not correct and "on Amazon" is correct has entered my mind. Midway through this process of changing "at" to "on," I got to wondering if any style guides dictate which one is preferable and whether or not this applies to other media platforms (e.g., Twitter, Facebook, ...). I want to be consistent on this, and to be truthful neither one or the other sounds better to me, but I once heard a news broadcaster correct himself on television. It was Brett Baier and he seemed to be applying some sort of prescribed, dictated usage one time when he emphasized "on Twitter." He may have even added "not at Twitter." (It was a while back and I don't remember his precise choice of words or word order, but that's a good gist of what I heard.) It sounded as if he had been corrected by someone and was now applying what he had learned. I remembered this as I was going through my copy and changing all instances of "at Amazon" to "on Amazon." All of this made me curious, so I took some time to run a few combinations through Google's Ngram Viewer as well as Google's search engine. The images below show you what I discovered:
In the charts below, the columns indicate the number of times more prevalent "on" is over "at" (although there is one exception and I comment on that).
This then makes sense why "over on Amazon" and "over at Amazon" sound equally as good to me ... they are being used virtually interchangeably and, in fact, "over at Amazon" may actually be more prevalent in some registers.
Anyone reading this may have come to the conclusion that I've answered my own question, but really what I am looking for is some sort of style guide that dictates the usage of one over the other. If I have some sort of authoritative guide that dictates one over the other, I will continue the somewhat tedious task of swapping out "at" for "on." Now knowing that at least informally, there appears to be some amount of interchangeability, to continue doing this without any formal guide prescribing one over the others seems rather silly, unnecessary, and unproductive. From the disparities of "on" over "at" via news searches, I have to assume that there must me some sort of proscription going on. Anyone happen to know?