How spammy backlinks are index faster?

When a website get hacked. Like Japanese keyword attack or something like that.

Thousands of pages are got indexed within short time for the main domain.

How?

Where, a white hat backlink or high quality article on the main domain takes time to be indexed.

So how does this happened?

Any clues?

I've looked into this a bit and only found some evidence in a few occasions, but what I found was mainly backlink-based. I found a few sites suffering from a similar hack, and they had pointed several 301 redirects to key urls that contained loads of internal links to the newly generated pages. These 301s had thousands of spam links pointing to them. I guess they use the 301s like garden hoses - pointing them at the hacked sites they want to 'grow', feeding them with link juice, then pointing them somewhere else when the domain has been cleaned or burned.

I've also seen sites that just use comments on Google News-enabled websites for getting those pages indexed, but from dozens of different domains.

I am not sure but backlinks created through injection or hacking index faster because either they are sent through any indexer which works or they are interconnected to other backlinks created through injection or hacking.

Spammy backlinks are not indexed faster. Such links can actually lead to a decrease in rankings and can result in a penalty from search engines. Quality backlinks are the most effective way to increase rankings and visibility in search engine results.

I had similar queries when I got hacked recently. And I found that the reason is text-only content. The crawlers find it easy to crawl and index faster.

Spammy backlinks do not indexed faster. Google counts them as spam. Your website rank will fall down.