You have to watch the movie "Middlemen". It's strongly related to this post and interesting. Plus it's funny. ~BONUS~
It explains how, when, and where porn hit the web.
The most interesting thing I found in the movie is that the script that allows all transactions via credit card on the web...for any product sold today...was written by one of the two monkeys who introduced porn to the web. They are rich today from selling that by-product of the porn sales industry to every credit card company in the world.
Check out the movie 