About Duplicate Content Issue for Niche Blog Commenting

About Duplicate Content Issue for Niche Blog Commenting
I recently bought niche blog commenting for 2 different provides that advertised as manually handwritten etc but the reality is that after the reports are received, it shows that they were not true. I checked and saw that every single comment was randomly copied and pasted from another website, not manually handwritten.
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So besides the issue of the blog comment to be entirely duplicated content, the link is randomly just thrown inside the comment unnaturally.

I am sure quite many people had experienced the same problems and issues like this, and I am wondering will be any positive SEO effect, negative SEO effect or just no effect from this issue?

It was like 200+ blog comments like this which had all duplicated content with link randomly thrown inside.

Would there no positive SERP effect from this since Google can easily see that this is pure duplicated content?

And obviously this would look unnatural in Google's eyes since suddenly there's 200+ blog comments popping up which are purely duplicated content (copy and pasted) but would this actually cause the website to go under Google's attention and cause some negative effects?

I am asking the 2 providers to try edit their blog comments to make them unique but currently, it does not look like they would really be doing it.

If you have some experience, please share. Thanks.

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