Ideas on how to make a living as an artist

Based on the survey posted on the LinkedIn group, the number of comments as well as private DMs I think that I have gained a pretty good overview of options that are available for the artists in terms of the 3rd party websites.
List of the reviewed 3rd party websites:
Artfinder.com, Ugallery.com, Artpal.com, Gallerima.com, Redwoodartgroup.com
Artsper.com, Kazoart.com, Artmajeur.com, Artphotolimited.com, Artrepublic.com, Arsmundi.com,
Bluedustcollective.com.au, Artconnect.com, Gallerihuset.com, Derfeineartshop.com
I would like to mention right at the beginning that this is not a scientific study but a blog post where I publish my subjective feelings and impressions.
What does it mean?