On: Q: Can you shove a million spam pages down Google's throat in May 2008? A: Yes

[henning]

blackhat SEO: you artificially raise the pagerank of websites which attracts visitors and therefore advertising dollars.

it's about making money.

[aitoehigie → henning]

That is, if they are dumb enough to click on the ads on the site.

[henning → aitoehigie]

It's like any other spam: you go by the numbers.

Certain niches can be extremely lucrative, the classic ones being porn, gambling (especially poker), and pharmaceuticals.