This is very true, Keep in mind that there are a lot of record labels, some that even have distribution through major labels like Sony and Universal, these smaller labels are notorious for pushing new artist and buying a ton of fake activity. I'm aware that indie labels utilize fake activity hell I am even using it myself now lol. But having served a long time with the majors, I'm telling you it's not going down that way. It seems legit though, like buy some activity to look good make yourself seem as if you have fans to attract others but, the majors do not play in that field, there is no need to. Millions is spent behind advertising and target market outreach and having personally signed off on these kinds of advertising budgets I really wouldn't see the point. You have to actually see this stuff in action. Millions of fans support the artist they love. I know this doesn't seem like truth though but it is.
I on the other hand love fake activity because it really works on having potential customers think you are big, and since I do not have access to the money the labels do, I have to employ some way to make it seem like i'm big if anyone is going to buy my product. Customers can be vein they want to use and buy from people they feel are already popular.
Once again if you are asking if the majors use fake or in house proxies, NO but indie labels (and yes even the ones distributed by The majors who stamp the majors name on their sites) certainly do. and me I SURE THE HELL DO!!!