[hildaman]

I don't think they are monopolies.

I use DuckDuckGo for search & Twitter for social media. I find discovering new things/People on Twitter more interesting than the sclerotic family/friends stuff on Facebook.

[paulddraper]

See also: Bing, Instagram, Snapchat, Yahoo (though Yahoo now uses Google because Google was better).

[hildaman]

Instagram is Facebook owned now.

[paulddraper]

Proof of how successful they were as a competitor to Facebook, rather than being outcompeted by it.