How stuff used to be sold: Weird Tales Magazine 1927
Back in the day this is how things used to be sold. Advertising in the back of speciality magazines was a huge business.
This was how copywriting started. Since it costs a lot of money to buy one of these ads, you wanted to make sure it was ultra-optimized to convert well.
So copywriters would constantly test ads to make sure they get the highest return.
This ad is from Weird Tales Magazine from 1927.