Wow, so either sothink is the mother of all this or just jumped the wagon. They have been around since forever, unlike some of the other ??? companies. Means they have something to lose. As he have found out it is highly popular area so if in spamming business they will.
But who is spamming on the forums? If they all have affiliate and reseller deals like Sothink then it can be anybody. Does not have to be directly tied to company - which won't police any affiliate rules, not if there is money to be made. You know PC-Tools? They are master of affiliate spamming with security stuff, indirectly to blaim with high percentage shares of deals and extravagant service towards eager marketers. No policing what so ever. But Sothink is at least not a typical company doing this. I doubt you find much "history" behind most of those urls.
From 2008, then list is even longer today.
Yes Sothink still promote the golden oldies from 2002 or so but also has a side-business