It isn't shifting towards an oligopoly unless you count things like Wikipedia as a monopoly. Which it isn't, Wikipedia is probably about as close to an ideal democracy as any human project ever attempted.
There was a project similar to Wikipedia, but for semantic data. It lasted for a little while before being swallowed up by Google and shut down[1]. Granted there are some alternatives, but after investing some time working with freebase data, I should be allowed to hold a grudge.
Google played a key role in muzzling more widespread usage of RSS[2], along with Twitter and Facebook discontinuing support for it. Similarly, jabber[3], XMPP[4].
These days it's risky to even host your own mail server, since most people you correspond with are likely to use one particular email service that may arbitrarily block messages from lesser-known mail services[5].
[0] https://en.wikipedia.org/wiki/Censorship_of_Wikipedia
[1] https://groups.google.com/forum/#!topic/freebase-discuss/WEn...
[2] https://www.fastcompany.com/3013890/reader-may-have-died-to-...
[3] https://blog.twitter.com/en_us/a/2006/use-twitter-by-instant... (couldn't easily find press of the discontinuation of this service)
[4] https://news.ycombinator.com/item?id=9266769
[5] https://www.tablix.org/~avian/blog/archives/2019/04/google_i...
Why not shake them down for those sweet donations?
Im saddened by the death of rss too, but i think its a lot to blame that soley on google. If the rss ecosystem was so weak, that shutting down a single rss client killed it, it couldn't have been long for this world anyways.
Google made it impossible for existing solutions or upstarts to compete with their free tools, then slowly killed off marketing it and supporting it. The final straw was when they killed their reader.
Google killed RSS and they are actively killing other vital parts of the Internet in favor of their tech (forcing the use of their AMP tech for the best spots on their search engine results is anti competitive, Their web browser Chrome has saturated the market and is also making decisions which will undermine the Internets open protocols, but literally hiding the protocol in URLs, hiding the path in URLs, thus forcing people to search more).
Google is not alone in using it's capital as a destructive force on open protocols and standards. Facebook, Amazon, and Twitter are the same way.
wikipedia has their own drama. it has contributors who shape the content into what they want the world to see instead of staying objective on certain topics. often articles on simple topics are so complex because they are written by enthusiasts and aren't trying to inform beginners or curious.
we need better!