Privacy nhilists, mostly. If Facebook has all my data, and I want to keep using Gacebook, I'm forced into some position about their information policies. I've heard if from a lot of guilty-pleasure Tiktok users, many of who are also Facebook users.
Saying Facebook and Google are good at privacy now is like saying fast food has better nutrition in recent years.
Meanwhile in countries that actually care a lot about privacy with good historical reason, like Germany, have no problem using open source and self hosted services whenever possible, especially at the state level.
Mastodon seems to have a dramatically higher European userbase than US. That much seems clear from my time on it.
Also the German government, French government and others are using open chat systems like Matrix and favoring open source privacy respecting office and documents systems, forgoing giving the US government controlled FAANG companies, who happily have the CIA/NSA as customers, too much control of their internal affairs.
My favorite evidence of the radically different culture is going to hacker conferences.
Go to Defcon and everyone has a stock Chromebook or a Macbook. The Privacy Village asks everyone to accept the ToS of Discord, Twitch, and Google to participate. It would be a funny joke if it were not so sad.
Meanwhile at CCC in Germany... you are hard pressed to find anything proprietary at all from running the conference to the tools of choice of those that attend it. Germans remember well the cost of giving too much control of information to a central party. They have no problem making some UX tradeoffs to have freedom.
