When I was taught it it was not pure left/right. Rather a method to differentiate levels of Libertarianism form other branches of liberalism focused on social justice (rising tide and all that). Any idea where you read it? Poli sci wonk phrasing being included into more popular literature is always fun to see.
Freedom rule (lemmy.blahaj.zone)
backdoor in upstream xz/liblzma leading to ssh server compromise (www.openwall.com)