I recently discovered that there are about 200 spammy links leading to my site. They have keyword anchor text and are mostly found in unmoderated comment sections and in the "blogrolls" of awful, no-traffic sites. I am perplexed by this becaause I had nothing to do with creating these links--have never bought links, paid for SEO, or done anything but try to make a great site--but that's another matter entirely, and beside the point here.
Let me clear that I do not plan to pay for link removal services. I'm going to go through the 200 links myself, contact the contactable ones and request removal, disavow the uncontactable ones, and disavow the contactable ones that don't heed my removal request in a week or so.
The thing is that I have no idea what anyone could do beyond what I have just outlined. Meanwhile, I am aware that there are link removal services (usually under the umbrella of SEO) that charge a pretty penny for this stuff. So, am I missing something? Do they do something I'm not aware of? What do they actually do?