SEO content farms definitely aren't going away. In some specific cases, they aren't even that bad. However, they are enabled by the fact that with modern ad tracking you can target the same people there as on a premium site. This causes quality to decrease. Just to give an example, this[1] is how this dynamic affected Recode:
> "I asked him if that meant he’d be placing ads on our fledgling site. He said yes, he’d do that for a little while. And then, after the cookies ... helped him to track our desirable audience [he'd] begin removing the ads and placing them on cheaper sites"
> "I asked him if that meant he’d be placing ads on our fledgling site. He said yes, he’d do that for a little while. And then, after the cookies ... helped him to track our desirable audience [he'd] begin removing the ads and placing them on cheaper sites"
[1]: https://www.theverge.com/2017/1/18/14304276/walt-mossberg-on...