The Internet is written by bots

So I did a web search for "Lisp typeclasses" and the top results were these. They are exact clones, the same question and same two answers with the same wordings. Why the hell would people make bots to grab text off Stackoveflow and paste it to their sites?

http://sofd.developer-works.com/article/19312534/Typeclasses+in+Common+Lisp
http://ambracode.com/index/show/187304
http://stackoverflow.com/questions/30637469/typeclasses-in-common-lisp
http://www.solved.online/974876/typeclasses-in-common-lisp

They think it will make them move up in Google rankings. It won't help very much, only getting them money from the people like you who will only go there once, but it's mostly various species of nigger (often curryniggers) just throwing their shit at the wall to see what sticks.