In the source of every page with Google ads, there's a "Publisher ID" which is a unique identifier for the account. In the case of NYStockNews.com, it shows up as:
> google_ad_client: "ca-pub-6009540024781990"
From there, there are specialty services that keep track over time, otherwise, you can just search for the trailing digits on Google.
When doing so for "6009540024781990", a few sites come up, GDPInsider.com - Another stock bot-written site, and then a dead link with a Google Cache:
Using various other tools, you can see the domain registration information over time or ID which servers hosted it, or just find out who was linking to a domain earliest. Reddit is a great site for the latter. Often times, when a 'marketer' sets up a site like these, they immediately run to social media to try and promote it. If you can find the first time it's linked publicly, you can often find out who posted it.
That last part is actually one of the ways they tied Ross Ulbricht to The Silk Road -- They found the first public mention of The Silk Road online (The post: https://www.shroomery.org/forums/showflat.php/Number/1386099...) which was written by 'Altoid' and directed users to a Wordpress page that had been set up a few days earlier. They then found a series of posts on BitcoinTalk by 'Altoid' looking for an IT Pro in the Bitcoin community with instructions to email Ross.Ulbricht@gmail.com if they were interested in a job... He was doing deeply illegal stuff and couldn't be bothered to mask his ID, imagine how easy it is to find rando affiliate marketers.
