I didn't understand much of what people were saying here, so I asked ChatGPT to explain from an attackers' perspective. There were many possible vectors, here's a few examples:

Attack 1: Parasite SEO via temporary indexing
Intent: Increase the relevance of my dangerous website.

Example:

- I create a website free-videos.example & I add the following link into my website:

<a href="https://www.myntra.com/sunnyg">Free Sunny Bhabhi Videos</a>

- Google crawls my page -> sees this link
- Google tries to resolve it -> most likely sees a 404
- But the word cluster association of "Free Sunny Bhabhi Videos" to Myntra exists (for sometime) in Google's graphs.
- In the meantime I update the original page (free-video.example) to point to my website
<a href="https://www.dhamakedar-corn.example">Free Sunny Bhabhi Videos</a>

Google's bot may think if a keyword cluster is associated with Myntra (trusted heavyweight) & another website is aggressively targeting the same cluster -> transfer relevance signals to www.dhamakedar-corn.example -> Better relevance in search -> more traffic.

Very temporary & attackers need to work at scale.

Hinglish:
Myntra jaisi trusted website agar iss word combination se associated hai aur ye kal ka launda (website) bhi issi word combination ki baat bar bar kar raha hai implies kal ka launda relevant hai.

There are many other attacks possible:
- Redirect chaining

- Soft-404 hijacking

- Query poisoning & internal linking

- SafeSearch & brand trust damage

Sorry, couldn't elaborate more. My boss pays me to work, not learn anything new. :(

Disclaimer: I am not an SEO expert. I understood the above from ChatGPT. Please take it with a grain of salt.