While the article doesn't mention it directly or indirectly, isn't this exactly what the social media giants would ideally want? Regulation might raise the `Barriers to entry` for any potential new social media site, if there was any chance of a new one coming up and taking a pie out of FB / Twitter, etc.
Potentially not. If the big giants want to take the role of a publisher, why would a startup do the same?
If the startup isn't interested in moderation, it wouldn't need a huge staff.