More from the article ...

... The study was conducted by IT Asset Management Group (IT-AMG) and it analysed the privacy policies of over 5,000 apps from the Apple App Store.

These apps were selected from a broader list of the top 100 apps in each category, with duplicates and those missing data removed. To determine which apps are the most invasive, they created an index out of 100 based on 46 indicators including 35 types of data, six purposes for data collection, and five different types of user relationships.

The level of privacy intrusion was measured by whether each data type is tracked and linked, tracked, linked, not linked or tracked, and not collected at all, with "tracked and linked" being the most intrusive.

Top 10 most invasive apps ...

Instagram ...

Facebook ...

[see the article for the reasons why ...]

@#2

Agreed.

@#4 ... How about ...

That's what I thought the comment meant.

The article is just about the data collected.

Aside from that, I'd say there is also a possible addictive nature to the social media.