There are examples of groups of people being fairly autonomous even within very authoritarian nation states. It's not a perfect example of course, but the Cossacks are one. They occasionally fight for Russia when paid to do so, and in return they get pretty much the liberty to run their area by themselves.
Basically, a group of us find a service (doesn't have to be mercenary) to offer, and we exchange that service or a product in exchange for independence. Another modern day example is Liberland.
Liberland isn't working to provide any service or product however. They are just collecting money to "purchase" territory. That idea sounds okay and all, but it is very hard for me to trust such groups. The money tends to get spent in ways the individual might not like. Who gets the best plot of land? etc...
RE: Anarchy in a meme