Companies would never employ predatory behaviour to prey on customers, and have never had to be regulated before. It really is the customer's fault for engaging.
They used to be a bit of a phenomenon back on the 196 subreddit, and posted their own videos there. (Which in turn was cause for some controversy as an exception to the general "no nsfw" directive)
The advertiser's don't place the ads themselves. They say where and when they are placed, but the actual placing/integration is done by the likes of Google, Facebook, and, in this case, Mozilla.
That's the "third party" that's doing the tracking.
But regulations are bad, right? They impede the free market, right? Right?