Yes I do -I had a business for 27 years and when it was sold I was going to retire young, but having been so active, work wise, all my life I started selling on ebay.
This was very successful for years, and then I went to teaching old people how to use computers.
Then I went to doing mystery shopping for a few years, but the money was really bad for the effort.
Next I graduated to doing surveys and the money was even worse however I was home a lot and living in the country so I enjoyed it and continued to do it.
Now i do Hub Garden, and occasionally a survey plus I sometimes sell some of my collectibles online.
So YES I definitely rely on my computer to make some extra money apart from my regular income and have done for many years now.