Typically, high-end courses sold by B2B magazines do well in categories that require certifications and computer use, such as accounting, real estate, and insurance.
The success of a course aimed at manual laborers, such as paving, sounds counter-intuitive.
However, just because some jobs don’t require college or vocational education, take place offline, and are considered “unskilled” doesn’t mean they are. Here’s one publisher repurposed an archive of how-to-content into online courses. Indluded, platform used, and how he did it with no additional employees.