Because the companies are never directly doing it. They hire small firms to do it for them. They're everywhere in California. They masks themselves as "promoters to help you business grow." Anyone can hire them, even Youtubers.

Some suck at it like whoever posted this. Shitty title, no comments, wrong subreddit, etc. But make no mistake that plenty of groups are quite good at it. They're filled with younger talent that know the basics of social media sites.

These groups aren't hard to find if you seek them out. They'll promise you exposure on the most popular sites and most of the time, their customers get what they pay for.

People only complain when its super obvious. Though its not difficult to not make it look natural for anyone who's been on this site for more than 6 months.