This (screenshot) is actually a good description about Anarcho Capitalism in a statist world (obviously if the state is gone it's not a black / gray market anymore).

The part that comes after it is B.S. IMO. That Anarcho Capitalism accepts political strategies is just not true. It literally describes how human interaction would work under 'capitalism without rulers'. That some libertarian thinkers who call themselves Ancap believe they can use political strategies to get there, has nothing to do with Anarcho Capitalism itself.