Ehhhhhhh....
I think the focus is more on them just because of the nature of their industry. Other social networking apps have a hard time breaking through because....everybody is already on a given app due to its community. Migrating everybody to another one is considered a hassle by a large majority. I don't think it's simply a feature of market consolidation via monopolization. Furthermore, market consolidation that's been occurring in other industries isn't anywhere near as touted - look at the oligopoly in pharmaceuticals. That actually kills people and we're here complaining about social apps?
Google - catchy name for a reason. Large database of information. Consumers prefer one stop searches - they don't want to bing one thing, ask jeeves another, and then yahoo for something else.
And amazon? They're forcing big box retailers to up their game. Best Buy is actually pulling through. Sears was a disaster in the making - it wasn't just amazon that ate their lunch. Toys 'R Us was notoriously expensive - and don't even get me started on Legos. Clothing retailers are starting to realize they can't just hang clothes on a wall and get people to buy them. And more and more I'm noticing you can get items cheaper at other stores than on Amazon - you just have to look. On "amazon day" or whatever the f**k it was you saw retailers undercutting Amazon's sales on the same day and actively marketing it. They're starting to catch up.
Apple - they're bad because they make the most? Consumers are obviously willing to pay it and there are clear competitors out there - Samsung, Nokia, Huawei, Sony, etc. I don't understand that one at all. A monopoly on profits isn't a monopoly on market share.
https://www.macrumors.com/2017/04/20/ip ... e-high-us/
At most they have half.
That said, I'm not against revisiting TOS for the internet giants. The big issue there is data.