/r/politics is extremely US "normie Democrat voter" (which does not align with the actual party, it's different and sometimes worse) but the popular financial subs like WSB/investing certainly aren't.
This is just a passing trend though, 10 years ago everyone on the internet was libertarian. Which is how you knew the internet wasn't real. Nobody's actually a libertarian in real life.
I'm going to assume what you mean is that nobody lives entirely by Libertarian ideals. While that may be true, it's true of every other political category as well, so I guess nobody is anything under that logic.
Almost nobody claims to be a libertarian or gets elected by the party. Justin Amash and Ron Paul are maybe the only famous politicians.
On the internet there's that political compass site that tells people they're libertarians, but it was made by libertarians so I think it's a recruiting tool.
But it's also true that people don't practice it in real life. Drug legalization, yes, that's going somewhere if slowly, but the right wing libertarians still tend to be NIMBY in local politics.
Is the point of libertarianism to participate in a community? (Maybe it is.)
They haven't, like, done anything though. Not many politicians elected, no drugs legalized, noone freed from prison, state control over people generally not reduced. I have heard of a few attempts to start libertarian cities that failed because you can't get a Walmart when your taxes are too low to construct a sewer line.
This is just a passing trend though, 10 years ago everyone on the internet was libertarian. Which is how you knew the internet wasn't real. Nobody's actually a libertarian in real life.