In the late 1990's one of the late-night infomercials was Video Professor. They produce training CDs on how to use the computer. In the half-hour-long Infomercial, they were promoting the ability to try out their videos in any subject that people want. All you had to do is pay for shipping and handling.
What Video Professor didn't talk much about is the "fine print." Customers would be signed up for a subscription service where future videos would be charged to the credit card on file. They wouldn't get charged if they canceled their subscription. Some of the videos would cost between $50 to $399.
Due to various lawsuits and lagging sales, the company folded in 2002.
Here is a clip of the commercial that I recorded on April 24, 1999 - nearly 22 years ago.