The Guardian has a good article on spam,Why the spammers are winning that is based largely on a new book Spam: A Shadow History of the Internet by Finn Brunton. The article tells about what may be the first modern spam message which was distributed on a Sunday evening of 1864 by a telegraph company. The urgent message was from a dentists company advertising their hours.
What is interesting is that spam filtering and spam filter bypassing agents are text technologies that are getting more and more sophisticated. As filters got better spam is no longer a matter for amateurs. Spam is also changing – there are more an more inventive ways to get you to read junk ads. For that matter at the end of Guardian articles there has been a collection of links to articles in the Guardian and elsewhere that feels a lot like clickbait. The links are paid for and provided by Outbrain. They tend to be ad cloaked as stories.