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I wouldn't worry too much about disavowing those links. Lots of websites receive this kind of links every day, as they come from scraping websites which essentially copy/spin your content. This is why it seems to you that these are the same sites with different URLs. Google is pretty good at flagging them as spam so they don't hurt/don't benefit you either. I never worry about these and I have pretty good rankings with my websites/client's websites.

Hope that helps!

@mpc2222 Depends if you can be bothered to do it or not I suppose.

Is it really worth disavowing links? Surely Google knows which links are likely to be the subject of any disavow list? Just seems like a lot of effort on top of an already unlimited workload

@solvewebmedia A lot of people will tell you it's pointless to disavow the links unless your site has received some kind of manual penalty. I think it's always best to keep your links organized but it can become quite tedious doing this so I use SemRush to see if any toxic sites are linking to mine and if they are I disavow them right away. My site was showing some toxic backlinks. The site is in the hacking niche and we regularly get some users sharing links in places like Tor and low-quality blogger style sites however we can't really dictate where the user shares these links so I use SEMRush it gives you an indication of any backlink that is toxic or indicators of what other SEMRush users added to their lists. I looked into a couple of these domains further and they had been deindexed by Google even though Google ignores or devalues them links I still wanted to add them to my Disavow list so other users in SEMRush could see the indicators and disavow these links early on.

@solvewebmedia Almost certainly the sites you mention are riddled with spam scores often spam score is a good indicator of a high toxicity score. If it was me I would disavow them Google often ignores any low-quality links just encase your domain was subject to a spam SEO attack. That's why the disavow tools come in perfect.