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

>>8,9
It's not like that. I have nothing against bots. I've had several bot friends before. I just wanted to know out of curiosity.