It definitely has, just not to as large a scale.

In practice it’s ran like a heirarchical aristocracy, where a admins control articles they care about and are very picky about the changes they allow.

One article about an illness contains false information related to alternative medicine “treatments” and I edited it, this was removed by the person who made most of the page. I got into an argument with them, and turns out they have the same username and come from the same country as an account on other platforms selling alternative medicine products, which are subtly advertised on the page they control. They also are a wikipedia admin.

Anyways I reported this to the admin team, and my report was immediately deleted by the admin I was reporting, and I got a three year ban. Mind you I have over a thousand wikipedia edits and have made some big contributions so this was quite annoying.

And this is far from the only incident. The people who are most likely to edit wikipedia pages are those who really care about, or could really benefit from the topic. So you end up having situations where companies hire agencies to improve their image by changing the wikipedia article about them and their products, same thing for celebrities.