Are these paid or something?

They can be. Instagram, I don't use, but the statistics are likely representative of all social media.

• A single day’s worth of posts tagged #sponsored or #ad on Instagram contained over 50 percent fake engagements, according to data from anti-fraud company Sway Ops.
• Out of 118,007 comments, only 20,942 were not made by bot followers.
• Sway found that more than 15 percent of influencers who sign on to do sponsored posts (and take the product associated with it) never create a post.
• Bot comments are responsible for over 40 percent of total comments for over 500 of 2,000 sponsored posts made each day, per Sway.
• Pods remain a problem as well: Sway’s recent research found that out of 2,000 posts, an average of only 36 sponsored posts made per day contained no Instagram pod activity, fake comments, fake likes or uneven ratios of bot followers to engagements.

https://digiday.com/marketing/cheatsheet-need-know-influencer-fraud/