Thanks so much! So glad you are interested in learning more about freelance writing tips! As for your question, if the site no longer exists you can’t promote that piece unless you have the raw copy. Then you can add an annotation to it and upload that to your blog or Contently. As for your passions, you can skew that to more of business writing or even productivity for businesses writing tips? Explore that and look online for that type of business (even if it’s office supply businesses or some form of business supply app like ShoeBox).
While most of these companies advertise that you can earn upwards of $18 or so an hour, the reality is that you're not going to make that much once you figure in your gas expenses and wear and tear on your car. Also, work may not always come in consistently. I would recommend doing more than one of these if you really want to make it worth your while.
These little jobs are done by people who log on to a company’s site and choose tasks, which could be as simple as clicking a link. Amazon's Mechanical Turk is one of the most well-known sites of this type. Also, there are crowdsourcing projects, which are similar to data entry, where companies engage an army of virtual workers to each do one small part of a larger project.