What is the ruling on working to supervise and promote commercial company products via social media and writing articles about them, or giving opinions on them for a fee?

There is no objection to working in any of the three jobs, provided that the goods and services are permissible, that the promotion does not involve cheating or deception, and that the greater part of the entity's activity is not prohibited, based on the Almighty's saying: "And do not cooperate in sin and aggression."