> 1) Word-based crawling/indexing: quickly abused by spammers. I guess that ends quickly once spam means you get blacklisted no matter how many Google ads you

> 1) Word-based crawling/indexing: quickly abused by spammers. I guess that ends quickly once spam means you get blacklisted no matter how many Google ads you serve ;-) A large piece of this article hints at how they have some interesting options that Google doesn't have.