I think reposting things here is fine as long as you put a source. If you think its wrong to monetize reposting like that then youre probably right but it might be good for now because once the people who're publishing content on other social media sites see people are making money reposting their stuff they wi;ll join Steemit and knock those reposters out of circulation thus strengthening Steemit.
Just have to keep educating everyone on plagiarism and why some content is or isn't upvote worthy. Have a great day!